I have had no period for 2 months and yesterday I started spotting very light pink and not a lot cause I'm a heavy bleeder, had unprotected sex same day and now I'm not spotting what could it be?

Have you had unprotected sex since your last period. Since you have missed your period significantly, have you tried a Home Pregnancy test?

Yes I have, I tested 3 times all negative

Then I would talk to your doctor. There has to be a reason that you're not getting your period. There are some women who don't test well for the hormone that most HPT test for. You might need to get a blood test to determine what is going on. Good Luck.