Letrozole and ovulating!!

Am
 My first month on Letrozole, my dr didn't do any monitoring and I didn't ovulate.
 This month, he upped my dosage and scheduled a midcycle ultrasound with a trigger shot, but told me to still do OPKs at home.
  I ovulated today! I'm so excited! 5 days before my scheduled ultrasound. It's a little early (cd12 of a  normal 30 day cycle) but I'll take it!