Why do I have OCD now when I’m looking forward to my best summer?

So I know a lot of people search for the cause of OCD so to speak. And while no known direct cause is really scientifically stated and it just seems to be a huge puzzle right now (like the human brain in general honestly), I'd like to talk about where I think my OCD roots from. I'm unsure why I'm posting this, writing my thoughts off probably. I digress, I think for me it started actually after getting bullied/isolated at school. I don't hear people on this app talking about this a lot but I bet a lot of us have been bullied/ignored/isolated before. I've read in a study before that the odds of developing OCD after bullying is from what I can recall 10 times more likely (I think it was even more). It was a higher odds than with depression, which shocked me at first because everyone knows that bullying can onset and that it increases the chance for that depression. But then I gave it a thought. The bullying made me become more perfectionistic, making me feel like I couldn't do anything right, lose self confidence, doubt myself a lot, etc. Perfect recipe for OCD, it sounds like. If anyone's interested I'll post below what my experiences at school were, but honestly I am more interested if many of you guys also went through something similiar.

MY OCD STORY I’d like to tell you guys my ocd story because why it happened is still a mystery to me. I have never dealt with ocd for my life. I only dealt with some thoughts recently that I would worry about and obsess about but...most of my ocd thoughts would be something that my ex boyfriend would say. For example. My ex boyfriend would say things like, “I’d fuck her” about a random girl. Now I get those thoughts and deal with sexual ocd trying to repress those thoughts. Another thing is my ex used to say weird things about girls younger than him. Way younger, and talk about their body and how they’ve changed so much since the last time they’ve he’s seen them. This caused me to struggle with pocd. Anybody have any thoughts about this? I am not trying to blame him but just wonder if someone else had this experience or can explain what more this experience means for me. My therapist calls these traumatic memories, which I then obsess about.

I believe I’ve always had intrusive/OCD thoughts. When I was younger I always repeated phrases because my brain went “if you don’t do this your whole family will die” but it wasn’t anything too bad. However, when I was 15 I entered my first relationship. I had divorced parents and didn’t know what love was - so it ended up being abusive and I did not know. He forced me to disclose all the people I found attractive as well as all the “unpure” thoughts I had. He deemed fantasizing cheating - which I respected - but also caused for a lot of intrusive thoughts to make me freak out. He also gaslit me and accused me of cheating for the lightest things (gave my cousin a side-hug) and prohibited me from getting male friends because he thought I’d cheat (I’ve never been unfaithful or even flirted w another man. I’ve always had strong morals about it) I believe this trauma is what made my ocd what it is now, since I’m used to being accused for stuff I didn’t understand or have control over. I believe that understanding OCDs roots allows me to heal because it reminds me that I could exist without this thoughts and still had a good moral compass.