Pregnant?

ReinA
So my bf came in on the 3rd and 6th of this month. My last period ended on the 31 so i know i was fertile on the 3rd but i mean you could get pregnant anywhere before your next period right? Which for me is tomorrow but i don't feel a thing like a normally do. I took a clearblue digital test on the 12th but it said not pregnant. Now someone told me that cleatblue isn't that good and to use first response. Even my bf was confused because he knows I wasn't stressed out and my periods usually come in full force pain a couple days before its expected to start. Could i still possibly be pregnant?