I had intercourse, and there was a little pre cum, I recently had cramps and light spotting

So recently I had sex unprotected that was on the 14 and 25 of December he never really did his business in me or close to it as we stopped, the thing is there was a little pre cum but I asked him a serious question dos he ever wank before I went to his place and he said no, I recently had cramps that felt like period I went to the toilet and it seemed to be like spotting it was a light pink colour and I put a pad on I went out for a few hours came back and it was still nothing like period, but I'm still having cramps in stressing out over the fact I could be pregnant I came go to the doctor or tell my mum I'm to scared she will kill me, I have taken two home pregnancy test the both came up negative, I usually get my period around the 20th, but I haven't got it it's now the 30th but this spotting things occurring could I miss my period cause it's the first time or because I'm stressing I've done a lot of research and I'm really worried now, am I pregnant or am I having a early miss carriage it only been like two weeks since we had sex is this normal what's happening