Help!!

Due for AF on Wednesday. Been cramping for about 10-12 days, nausea on & off, fatigue, super thirsty & of course peeing a lot because of it. I quit nursing my toddler 2 months ago. My milk COMPLETELY dried up about 4 weeks ago. I'm now producing milk again...clear with some off white...looks like colostrum. Been testing & have been getting BFN's for the last 6 days. What the heck is going on?!?! I have a 26 day cycle. Has anybody had this or have any ideas or opinions of what could be going on?! Thanks in advance!!!