Birth control help

I've been on birth control for over a year now and I at least get a period every two months at least. My last one started June 25th. I take the pill called lo loestrin fe was having a lot of pain and I finally went to the doctor. I took a pregnancy test and it was negative. I found out I had a bacterial infection. This was August 23rd. My boyfriend and I use condoms. I've been cramping some today but no period. I'm starting to get worried. Is it possible for your periods to just stop? I also just moved to a new town for school so I've been stressed also my boyfriend lost his apartment during the hurricane. I hope I'm not pregnant.