My vagina burns when my boyfriend cums in me

sweetone • Heartless bitch... i lied im a fucking cry baby

Recently After sex my vagina becomes irritated and starts burning. I had sex three days ago and it’s just become worse. It’s currently stinging me. & im wondering if he’s given me a sti. We both got treated for chlamydia about 2 months ago. However, we didn’t go back to the clinic after 6 weeks to check how everything was. My vagina felt fine and he said he felt fine so we didn’t bother booking an appointment. However, now it’s burning and it smells weird. So am wondering sti? Yeast infection...? I really don’t know.

The last time i got these symptoms I went to the clinic and it turned out i was positive for chlamydia 😳. And my boyfriend swore he didn’t cheat on me🤔. But am wondering how else could I have developed it- I know I definitely did not cheat on him. & because we didn’t go back to the clinic after 6 weeks, if it turns out to be chlamydia again he can say the exact same thing.