Irregular 😕😕

Hey so I’m fifteen and last year got diagnosed with PMDD, and because of such started on microestron or like the least amount of birth control possible. Everything went well for the first five months, but now I’m 77 days late and my cycle has honestly never fluctuated. It’s always been about five days of period every 28 days and it continued to be that way until now. Im still a virgin and I don’t know what’s making this happen, but damnit its hard to schedule with gynos. I’ll be in eventually, but until then I’m just freaking out.

Anyone know what might be wrong?