So Over Spotting!!

Ti
I'll start with the fact that I have been trying to conceive for 11 months with my fiancé. Traditionally I would've wanted to wait for our wedding, but I tried for close to 6 years with my ex-husband, so I knew it could take awhile. Of the 11 months, 5 of those I was on Chlomid, estrogen, and  progesterone to help with fertility issues including but not limited to my PCOS. In February, my Dr recommended I take a break from the meds and I have appreciated the lack of mood swings; however, my cycles are just not reliable. 
The issue I'm having now (besides the obvious problem of not getting pregnant) is that the last 2 times I was supposed to be "fertile" I am spotting. Not for a day or two...like 6 days. I haven't had a normal period for a few months, but all negative tests. I'm just curious (annoyed, fed-up) at the spotting every 2 weeks! Has this happened to anyone else??? I can't possibly get pregnant this way, can I?