???????? HELP

HP

Had my period about 2 weeks ago and have been having very sore boobs…Thought I was pregnant and took a few tests this week and all of them were negative…I started bleeding this morning and it has been so heavy I’ve bled through 2 pairs of underwear and shorts and am now on my 3rd pair. I am seeing very large clots when peeing and when just sitting on the toilet as well. I am also experiencing some cramping and hot flashes. What could be happening? Check comments for an additional photo