I am 21 years old in the Last year of college. I had sex with my fiancé. I was under medications for menstrual cycle and some how I missed two medicines so I couldn't take it anymore. I had my periods on 30th april to 3rd may, I had it on 5th of May and just because of missed medicines I had my periods again on 9th to 12th. I am not sure whether I am pregnant although I had the tests done it's ll negative. Please help.