Okay, so last week I had my period and my boyfriend and I had sex, after that I thought he went inside me so the next day we went to buy the plan b I took and everything was going well I finish my period and everything but today I had some bleeding issues not spots. I need help I don't know if I could be pregnant or not because we took a test today and it came out negative so I don't know if this has to be cause by the plan b or not.