I just ordered a 20 pack of ovulation strips, I just stopped using Ortho Tri Cyclen Lo, and I'm wondering if I should test next month for my ovulation days, or wait a few months for the BC to completely leave my system? I've never used ovulation strips so I'm a little foggy, I'd also like some advice on WHEN to use them, I know 14 days past the first day of my period, but a time frame?? Thanks in advance!