12 more days...Fertile window just starting???

Does anyone else ovulate late or midway through their cycle? I'm on cycle day 19 & after a several weird results using Clear Blue Digital OPKs, I'm now (yesterday & today) getting the fertile notification for the first time this month. AF (or fingers crossed for a BFP) is due in 12 days. My cycle is typically 30-31 days. So I guess this could be normal? Any ideas ladies???