Why don't you ovulate? And if you have had trouble with ovulation before, what helped you?

We have been ntnp all summer and for the 2 last cycles, we've been actively ttc. I have a huge hunch that I am not ovulating at all. I can't temp because my sleep cycles are way to sporadic.
I am not getting clear answers from ewcm or opks.
Also, I had mid-cycle bleeding (not spotting) for the last 3 cycles now.

Note: With my son, I had very little problems getting pregnant (used metformin to regulate my cycles and some progesterone after I got pregnant)