So I used clomid for the first time and I called my dr when I was about to start (CD3-7) so they can set up ultrasound appts to see how mature my follicles are and also when to give me the trigger shot. I've been also doing OPKs to just see the process and 2 days ago my lines were dark, but not dark enough, and the days following now the lines have disappeared. Today is my first U/S appt and I'm just afraid I've lost my window and what if I didn't TTC on the right day. Has this happened to anyone??