Light spotting 5 days now! Am i pregnant, is it my thyroid, or do i have pcos?

I started spotting light pink on Sunday night at 8 dpo and everyday (it's Thursday now) I'm still spotting light pink and I had period cramps almost everyday! I took a test yesterday (11 dpo) it was negative. I have been spotting prior to periods and I just learned I have hypothyroid so I started levothyroxine last month. The spotting last month after being on the med for 3 weeks was only 2 days and a little heavier which improved from recent spotting and my last thyroid test I took 2 weeks ago was 1.18 which is great! So y am I spotting??? Could I have that pcos? I had a child without issues before but I hear that some women develop it after pregnancy. I also cramp badly when I ovulate. I don't think I'm pregnant because my boobs don't hurt and my temps are starting to come down. Just over this ttc. I see my gyne in a few weeks but I just want some opinions.