Okay so here is my story

So straight to the point the last time I had sex was about 6-7 weeks ago and since then I have had my period but it wasn’t as bad as usual it was light before then my boobs were hurting but I thought it was pms I took tests and they were negative up to now if I’m right and I’m pregnant I should be 9 weeks but I just don’t understand what’s going on.???has this happened to anyone

It’s very hard to tell but it’s there