What goes up must come down?

Hey everyone! So a little background: I have always had a high sex drive. Like always. I could have sex like 5-10 times a day if my schedule allowed it, and that was even when I was on the pill.

I’ve been off the pill for about a 15 months, and for months I was fine. No change. I got in a new relationship 3-4 months after I got off the pill and never went back on it, we just use condoms. Anyway, not relevant. Basically I am far more sexually experienced than my boyfriend, and I was always worried that my high sex drive would make him feel a bit weirded out and out off. To my surprise he just got on my level and we have a really good sex life.

Until recently, that is. All of a sudden, my need to have sex is vanished. Poof. Gone. I literally have no desire anymore, and I feel awful to my partner. It’s not like we aren’t intimate- we cuddle on the sofa after tea and we always fall asleep cuddled up and wake up the same way. We also have nice long make-out sessions that are great but I’m honestly just good with leaving it there and not having sex. Tbh I do it more for his gratification than mine. It’s not like I’m not attracted to him either, I really am. I’ve gone from having sex every day to having a sex once a week or even every two weeks.

The only thing I can correlate is that my periods because irregular in november, and they started behaving differently in august. I would say I noticed a change in my libido around september. Has anyone been through something similar and managed to get it back? Are you still just feeling the same? Any advice would be welcomed I want to make my boyfriend happy and I want to feel like myself again.

*EDITS AND RESPONSES*

I don’t think it’s related to my birth control. I was on the combined pill and came off it less than a year and a half ago, so I’d be surprised if my body hadn’t gone back to normal by now.

Thank you, I thought it might have something to do with my hormones being off but I didn’t want to speculate. Going to the doctors if I don’t get my january period, I already missed my december one.

I’m not pregnant. I’ve taken two pregnancy tests, one at 3 days late and another at 15 days late. Both negative.