M 20 year old. I've done sex with my boyfriend on 15 dec and he did'nt ejaculated inside me. Now its 7 dec and iI supposed to received my period on 2 dec and not yet received. I've sore breast from last week and cramps in my stomach from yesterday. These are the usual sign of my early periods but somewhere iI m worried that can iI be preganat. And if m then what should iI do because iI don't want to get pregnant