Ok so i have been on birth contol for 2 and a half years i get it every 3 months i was on the shot. I rarley if ever got a period so i have no idea when my last actucal period was..Rencently when me and my boyfriend broke up i stopped going. Well right before my last day to get my shot we had sex.I know that with going off birth control sometime you still might not get a period i have spotted like once sence i have been off but i was just a one time thing. I have tooken to pregnancy test one about a week after we had sex and one a month later.When my mom was prego for me she didnt show on any home pregnancy test she had to get a blood test.Does this kind of thing run in the family.should i get a blood test just to be sure or not worry about it???