so this is our 1st time using opks.. thought for sure i was pregnant last month but af came and only lasted 4 days when it's normally 7.. so I started my opks on Monday 11/25 when dh came home from off the road- he's a truck driver.. we bd on 11/ 25 27 28 30 .. 12/1 and 2. He left out this morning to go back on the road.. do u think we have a chance?