Cramping

I'm 4 days late, which is odd for me. my period is like clockwork. I had light pink then brown spotting for 2 or 3 days between my last period and now. AF should of come this past Saturday. I had mild cramping Saturday night for a bit. then nothing, till today. This morning a bit and now tonight has been the longest amount of time. I seem to have more then I normally would CM (sorry about the TMI) Just wondering if my body is thinking thoes 3 days in between reset my period so that's why it's late. Or if I could have a chance at a BFP if I decide to test (which I don't want to do and jinx it all lol)