I had a cyst on my right ovary last october. It shrunk down but before that i wasnt having a normal cycle and realized that was why. The doctors put me on birth control to help other cyst from growing because i have multiple small ones. I started having sex with my boyfriend about 2 months ago and it's be fine since then no scares or anything and my period has been normal for the last 5 months since being on birth control. But recently we have been having sex without a condom because i'm on birth control. I missed my period this month which is supposed to start on the 3 and last about 3-4 days. i got cramps 2 days before like normal but never got my actual period. I have also noticed i've been gaining weight for no reason because i eat heathy and stay active a lot. I just need to know that i'm not pregnant because i'm at an age where i should be.