Post sex depression (PCD)

I just wanna start this by saying I love my boyfriend. We are also both in upper class high school (for reference). I just don’t know what to do.

My boyfriend and I have been together for over a year, and started having sex at the end of August. I have little issue with the sex, and usually I want nothing else in the moment. I am definitely consenting. But afterwords, as soon as I leave or he leaves, I always feel terrible. Not just sad, but like mental breakdown, crying and screaming out my car windows terrible. Not for a few hours, but usually for at least a full day- it drastically impacts my focus, my mood, my ability to function.

And I really don’t know why. Once i’m away from him, it plays back in my head and i feel used, regardless of the fact that I consented in the moment. i just feel so bad, i’m not sure if i can really explain it. it’s really confusing and frustrating not to name exactly what i’m feeling or what the issue is, but i usually cry at least 3 times in that day period.

I did try to talk to him about it. we took a bit of a break from sex, but once we started again it just came back worse. he doesn’t wanna talk about this anymore it feels like, just suggests that there’s nothing to do, inferring we should just keep going. i keep bringing it up and i think he’s tired of me talking in circles about it (which i don’t blame him for) because it seems there’s nothing to do, short of permanently stopping. if i suggested that, i don’t know what he’d say. and i don’t think i want that anyway.

please help. i don’t know what to say to him, how to articulate how i feel since i’ve already tried and failed. and i don’t know how to fix it.