I was on one birth control pill. I switched to another for 2 months then went back to my old pills. i'm on cymbalta and I had not had a period in 2 months. I took 2 cheapy tests and they came out neg. I finally started my period a week later. It was pretty light. I have gained 25 lbs in like 4 months. I eat all the time. Sometimes feel alittle sick to my tummy. Could I still be prego.