My body feels odd

This is a longish story. I stopped having sex with my ex around February, I removed my IUD in March and didn’t engage in any type of sexual encounter from that moment on... until a couple of weeks ago when I started going out with a friend. We had sex multiple times, with no protection in some cases, before my ocultación and, what I believe, was the day after I ovulated.

I hate being that person that can’t wait and stats imagining symptoms but I feel extremely odd. My period is 30-32 days long and I’m on day 28. I am constantly gassy, I have intense insomnia, and I have a really weird headache, it doesn’t hurt, it just feels weird. And I’m always like warm, all my clothing feels like it doesn’t let me breath properly.

I know I just have to wait it out... but I feel different :(