I’m on my first cycle of Letrozole and my OPKs have been all over the place. Positive day 10, 13 and 18. My normal ovulation occurs 16-20. I started having some pregnancy symptoms day 15. With my son I started having the same symptoms two days after conception so I’m thinking maybe the 13th was ovulation but could I be ovulating multiple times? Normally I have a positive for 2-3 consecutive days but not this month. Help!