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Hi.I was supossed to get my period on May 16th. It never came. My boyfriend ejaculated inside of me on tues or wed(May 18 or 19) i gotten my period on thurs(May 21). Now, i have no idea if this is my period or not. My friend had gone through this whole pregnancy situation and shes telling me that its implantaion bleeing. She said hers was heavy like a period and lasted for 2 weeks. On the other hand mine is heavy also, but i only had mine for 2-3 days now. Am i going throught implantation bleedings or what? PLEASE HELP ME!!! Thank you!