Pressure??

I’ve been sexually active for about 3-4 years now and I have a new little issue. Anytime I’m having sex, I feel this pressure as if I’m going to squirt (never have before) but I feel like if I let go, I’ll fart. Like I’m always gassy and I don’t wanna fart while I’m getting hit from behind, okay? Is that normal? Do you guys think I’ll fart if I let go?

Also this new guy I’m humping has a significantly bigger penis than I’m used to so it goes deeper. In all positions, he’s hitting something and idk if it’s my cervix or my G-Spot but it hurts and feels good so what’s up?