ttc .. pregnancy a few questions

Va
My last period was 11-20-16 through 11-25-16 I had unprotected sex the 26 & 13 Of December.. the 13 my boyfriend cum in me twice , my period is due two days my boobs are kinda of sore but can I be pregnant ? I really want to be pregnant is there a chance that I can be ? My next period is due the 21st