I cant stop obsessing and i don't know what to do..

I always feel the need to make people repeat themselves and then like i say what they just said and ask if thats what they said because i feel like if i dont ask them to repeat themeselves i feel like i could of heard them wrong the first time so im just always making them repeat what they so i know thats what they really said and like i know what they said but im paranoid that like i didnt hear what the said right and its so annoying..
Ive never been like this before this only just started happening like two weeks ago or maybe a little more than that..
Its really annoying cause if i dont do that and ask them to repeat themselves and or i keep asking is that what they said like it will bother me and will stay in mind if i dont ask them even if its been an hour or more or maybe like the next day i will still ask what they said but like sometimes i dont even care what exactly they said well i do care what they said but its like i just have to ask and just get it out of my head then ill be fine. But other times i do feel like i have to know but most of the time i just have to ask and get it out of my head and then ill stop thinking about it.. most of the time. But like the same goes for me sometimes i just have to repeat myself just in case that person didnt hear me right or something and also like me rephrasing things i say sometimes cause i feel like maybe i could of said it better or added more detail and thats another thing i feel like i have to add like a lot of details like when i text i feel like i need to add all the details of like everything that happened in that moment even if it didnt matter and if it was unimportant and didnt mean to be said cause maybe i feel like im lying if i dont add all the details cause i only really text this one guy and i have lied to him in the past and i dont wanna do that again so maybe thats why i feel the need to add a lot of details and stuff with him? Cause im scared of lying again? Cause if i feel like i dont add certain details i feel like im lying also. I always add "im pretty sure" "i think" "yea im pretty sure i think idk but im pretty sure" like that multiple times in one text and probably like a hundred times a day cause if im not sure cause i always doubt my thoughts cause im scared if what if i dont remember that thought correctly or what if that thought i had didnt happen and if i tell him i always have to add the i thinks or im pretty sure cause just in case its not true or im just not 100% positive or whatever? but like it is sooo annoying.. I have never been like this but i think part of it is because i am scared of lying again even if its like accidentally lying cause if i say something to him and then like a day or maybe more than a day later i remember more details about that something i told him i feel the need to repeat everything i already but just add more details to it cause i feel like im lying if i dont... I dont know but i hate this.. i hate it so much like i feel like im going crazy and i cant handle it.. and i dont know what to do im even crying as i im writing this i always start crying when i think about this and how i cant handle it.. like i dont know what to do.. Im trying to find a therapist but until now im just looking for advice and just anything anyone has to say that can maybe help and just to know that im not alone and that im not the only one like this, like i know im not the only one with problems like this but its just good to be reassured sometimes.. sorry that this is kinda long just wanted to get it out and hopefully have someone tell me something that can possibly help... Please any advice or anything.. thank you.. sorry if there is any mistakes or anything or if some parts dont make sense.. thats other thing that annoys me a lot if i find a mistake in text i always have to fix it and say why i fix it then i just start rambling.. I always just start rambling about things that dont even matter and i cant help it but i hate it cause i was never like this or i was never bad with fixing mistakes i would just fix it and thats it i wouldnt ramble about it but i just ramble about anything now, any text i always end up rambling.... yea.. anyways.. any advice please..

Hi!I've been reading you're post and i think that tihs might be Pure O.I have pure O too and I understand you, I know how hard is to deal with this!Is not easy!Sometimes your mind create such a weird thoughts that you think is not you, and you get anxious, tierd, cant concentrate on normal things on your life...i understand you BUT YOU ARE NOT ALONE.
Firts of all you need to visit a therapist to put you a diagnostic, and be sure that is not you who think like this but only your brain has some problems with serotonine!
Try to calm, and do things that distract you from this, things you enjoy the most,and try to talk with youre mother,and explain her what you are going through!
Please excuse my poor english and my mystakes in writing this, I am from a far away country in eastern Europe.I wish you all good things!