My body is messed up

Help! I'm honestly stumped and don't know what to think. Feb I had my regular 5 day period, March (2 weeks after my period in Feb) I had 5 days of spotting off and on, would go from pink to like a brown red color but I never needed a pad, it only showed up on toilet paper (thought implantation spotting maybe) well I've taken several tests and all are negative. BUT I am now spotting again but this time it's pink and brown ewcm. I have pinching cramps but that's all, and lower back pain that comes and goes. Now should I mark my spotting in March an early period?? Because as of right now I'm 9 days late, is it too late to get a BFP?