Pregnancy

Patient: Me and my bf had protected sex the day after my period ended. We didn’t do it for that long probably around 5 minutes and he didn’t ejaculate. It’s been 4 weeks since we had sex and I have taken 3 home pregnancy tests and they have come out Negative! Are these accurate? Would I have symptoms now if I were pregnant?

Symptoms: Back pain
Neasus a little bit mostly in the afternoon
Chest pain

Doctor: