From Your Personal Experiences...Please Help?

I was just wondering the ovulation predictors on the internet, how many of you have become pregnant BDing on or around internet ovulation prediction. My ovulated prediction date was may 10 or may 11 two different sites. I have a regular 30 day cycle, last lmp was April 27 bd on may 11&12. Trying but not desperate, if we become pregnant we are excited but if not try again next month....lol I became pregnant with my first only bding one day after my predicted O-day, got a positive hpt just a little background. What do you think our chances are? Thanks for taking your time to read and answer my question