I am confused

I'm almost 21 and I have a problem that has been dragging me down for a long time now. About 3 years ago I started having 'bad thoughts' that evolved with time. At first they were like: 'do this or something or your mom will die'. I've been superstitious for almost as long as I can remember. When I was somewhere between 1st and 4th grade I felt the urge to do weird things because I had to such as lick the desk at school, tie my shoes 3 times before I leave, lick my notebooks, turn the switch on and off, touch things before I leave and many more. They are far less now, but the thoughts they just ain't going away, superstitions with numbers and colors as well. It's like I have on repeat 'bad' words in my mind, mostly venereal deseases. I am so stressed right now, it's been like that everyday, I just woke up and it began immediately, the moment my parents spoke to me and said a word that triggered it, I am so unhappy. Now I can't stop thinking about it. If I am doing something and someone coughs, I have to do it all over again. I pick my scalp a lot too, ever since I had dandruff one time. I do it a lot when I'm nervous too. Sometimes I can't enjoy the things I love, listen to the music I love and so on. If I hear about someone dying, that I knew of or someone I know had a relation with, the day turns into a 'bad' day and I restrict myself from saying things that excite me, like speak about my future for instance, because I 'm afraid something bad will happen to me. I never use new things I bought for the first time if it's a 'bad day'. I've been to the therapist and took anti depressants, felt a good amount of relief while I was taking them, but things are now back to how they were. Doctor said nothing was wrong with me and that I was paying too much attention to detail. I was also told by another person that works in that sphere, that because I have read information on OCD it has made me think I have it, when I don't, neverthless I told her I found out about it while I was researching my problem. I avoid certain 'words' and not only. I can't concentrate while I read or write anymore, it makes me so stressed out. I also avoid people that have gone through some serious pain in their lives and I feel so bad about that, but the thought that they've lost a parent for example just terrifies me and triggers the thoughts. I am only writing all of this because I have doubts that doctors in my country may not be very familiar with aspects of OCD, I was told that I don't even come near it, that they have patients that can't go to work because they have to cross the street everytime they come across a trash can and that I didn't have a problem. I don't know what to think and who to trust anymore. Would you please share your opinion ?

Thank you and bless you all.

Ive went through same thing my whole life and still do...