Late period- PREGNANT?!?

So basically me and my boyfriend was having sex and he’s cummed in me I was on the pill but wasn’t taking it long enough before he cummed for it to be fully effective and since that we’ve had sex many times but I’m now a week late and being extremely nauseous and I’ve done the bleach test and that was positive... I just don’t know what to do any suggestions of what could be happening with me?😂😂