So I always have irregular periods. I went on birth control to try to regulate them more but I was terrible at taking it on time. My last period lasted 2 weeks..my doctor said it was because my body was getting used to the birth control. It finally stopped and then this month I got to my sugar pills and on the 3rd day I got my "period" but it was really light and only lasted 2 days. I always have at least 7 day periods. I had unprotected sex that entire month, is it possible i'm pregnant? I feel sick all the time, not throwing up sick but just sick. Headaches, dizziness, i'm always hungry but then eating makes me feel even more sick. I've taken a pregnancy test but it came out negative. Any suggestions?