Hi guys, I’m new to this. Been ttc for 9months now. Recently started using opk.. my cycles are always 28-29 days. Stopped bc March 2017.

My Last cycle opk on cd12 was considered negative. My result line was darker then cd11 but not darker then the control line. I have been using opk daily since cd11 - usually two-three times a day Cd13 and I’ve only been getting negatives (one line only) AF is due in 1 week. Could I have missed my surge or maybe just didn’t ovulate this cycle? I did have stretchy CM on cd12.. but since opk was negative I’m confused. I’ve had tender, full feeling boobs random headaches and feeling very fatigue. Also getting random cramping that lasts a few minutes for the last 10 days or so.