Period after being 2 weeks late?

I am 2 weeks late with my period and I had some light bleeding after sex last night. I wore a light tampon and it was a little less than half full. I feel cramps but I don’t know if this would be considered my period or not. I should mention I took 3 pregnancy tests since being late and all were negative. I am so worn out from the not knowing of what is going on. Did this happen to anyone else?