I'm on fertile window day 2. 8 months ttc baby number 2, decided to try pre-seed. Has anyone had luck? I'm 22 I have a 4 1/2 year old daughter. Cycles had been regular 27 days with a 7 days and then all of a sudden started getting shorter so my Avg is now 25 with a 13 day fw. My last af was only 4 days long and I'm usually a heavy bleeder but this time pretty light. Any advise would be appreciated