Okay, then see your doctor for a pelvic exam explaining this issue and they may check your thyroid and hormone levels. They also sometimes will start a woman on the pill to regulate her. But this is best discussed with your doctor. good luck
No, I'm not sexually active so no chance of pregnancy or an STI
Hi there and welcome. Well, this can always be so tricky to figure out. yes, stress and changes in routine (and living arrangements as in a new roommate) can play a role in irregularity.
question though, are you sexually active? Any chance of pregnancy?
It might be a good time to go for a pelvic exam and pap smear. That would be the best way to fully understand what is going on.
good luck