Pre-Seed success??

Karen • TTC baby #1 with Loving soon to be husband(:
I recently BDed due to the fact that I ovulated for the first time ever bit I'm a little worried as I got a positive opk but had no CM, so I'm sure pregnancy is very low this time around. I'm hoping for the best though!:) If I don't get a BFP, what are the chances I wonder if I use Pre-Seed? Success stories ladies??!(: