Could I be pregnant again???

Hello y'all ma name is Mary and I'm 31 tryin for ma 5th wit ma hubby.... We had a miscarriage in 2012 in December at 6 week . Got prego in again same month which was November in 2013 and lost baby at 12 weeks in February 2014 .... Um thing is I have been having sex since 2 weeks after miscarriage , my period came for one this month yesterday and is GON today smh idk what's goin on . Plz help