What to do? Need help!

We've been TTC (hoping for a girl!) since May, but casually trying since around February. We've been trying Shettles, but it's been a bit difficult with erratic ovulation and irregular cycles. Check out my charts to see what I mean.

I'm taking Calcium, Magnesium, Vitex, Cinnamon (for blood sugar) and Cranberry.

So, yesterday I had a positive (dark) OPK. This morning, another dark OPK. This afternoon, a considerably lighter OPK. I'm having watery CM, but no EWCM yet. We BD'ed yesterday. I'm tempted to try again tonight, should I bother or would I be playing with fire? (side note: I'm sick so I took a little robitussin tonight)

What to do? Help! Please! :)