OCD Vs. Transgendered

I am a girl that's in a very dark place with either OCD or am I truly transgender. I hope you guys will take me seriously and not as a joke because I have cried, stressed, and have anxiety over this for the past 2 days. Here's my story:

I have never in my life had transgender thoughts; I am very happy with my body and never thought anything of it. The question I have for you guys is can you "suddenly" become transgender? And when I say suddenly, that's how my thoughts were... they were sudden. I was working with my dad and then all of a sudden a thought popped up... "Am I transgender? You are transgender," and ever since then it's been stuck in my head for the past 2 days. I've thrown up, cried, and had 2 breakdowns over this. Now I will talk a little bit about my past, I always liked playing with dolls, I liked guys ever since I grew up, my first crush was a man, and I am dating an amazing man right now actually for the past year and a half. Now I have to say I had HOCD before and those thoughts are completely gone only to be replaced with these type of thoughts. They don't make me happy, every time I think about it, I get sweaty, shaky, and eventually I'll start crying. I told my mom about this because I wanted to see how I was when I was a child; she told me, I was a girly-girl, I've always liked wearing dresses, I buy high-heels now, and I always loved getting pampered (getting nails and hair done). I like buying purses, bathing suits, dresses, and all that stuff. She told me I was a regular kid when I was younger and had no problems there. When I was younger I always wanted to get married to a man and be the bride, that was my dream.

Before this happened, I was very happy, I had HOCD for the past 2 months and now for the past 2 days, I've been thinking if I'm transgendered and that's what I really want when I've never questioned that about myself ever. I look in the mirror and check to make sure I like the body I'm in now and I never had done that before. Everything was natural before this all happened. I did talk to a school psychologist today and he did reassured me that my case is very different from actual transgendered/transsexual people. My case doesn't fit how the rest were. I always check on the internet to make sure that I'm not becoming transgendered/transsexual. The fact is that it would scare me, I'm not happy with these thoughts. I just want to be back to normal which I was 2 months ago before any of these thoughts happened. I was very happy in my relationships and had a great life before any of this happened. Is this the evil OCD running it's course?

This wasn't meant to offend anyone, I have gay and transgendered friends, I'm just trying to understand what's going on with my mind. Any talk/advice will help. Thank you for taking the time to read this story.

thank GOD I'm not the only female worrying about this!!! honey, I cannot tell you how much I can relate you. I'm just like you. I've always enjoyed being female, I never had a problem with my body/gender, etc. after I read a book about an FTM transguy, I instantly began to have these thoughts. also, since I'm a lesbian and I've heard that many transguys start out as lesbians, it really triggered these awful thoughts. I've never thought of myself as a man. I've always enjoyed being a woman, and I've never even wanted to be a butch lesbian!!! also, I was also pretty girly when I was little. I never had any boy friends, I loved princesses, etc. so honey, after everything that I've learned through this experience, it's that if you were REALLY trans, you'd enjoy thinking of yourself as a man. i know that this is not gonna stop the thoughts, but it's good help. if u need any more info, don't be afraid to contact me. best regards:)