When should you BD?!?

I'm new to this whole tracking thing. Needless to say, we BD at least once a day. According to the tracking apps, I should ovulate Wednesday. But that's going off my last period which was a miscarriage. But today I felt weird little crampy twinges and thought it may be today. So when you ovulate, do you try to BD when you get the ovulating symptoms or after? Thanks in advance!