Only spotting bfn


So I ovulated the 9th of may, I inseminated the 6, and 8th, my period was supposed to start the 24th, on the 25th I had enough blood for half a tampon, and after that it was just light spotting when I wiped. Which is weird because my period is always 7 days and really heavy.

Still have negative tests, I have sore breasts, slight cramping, headaches, and a blocked nose for the past two days.

I’m just not understanding, if I was pregnant Why is it not popping up, and if not what happened to the rest of my period..