37 day Cycle anyone????

If so, when do you usually ovulate??

I had a period June 2 for 7days.

DTD on june 26 and June 30 and july6.

Had another period on july 8-14.

DTD again on july 24,26,28.

It's looking like I have a 37day cycle..

I took a opk about 30mins ago and it was negative. According to FF I'm in my window of fertility....Ughhh! When would you think I ovulated???