1st cycle clomid age39 ttc9 months

Rachael • Happily remarried ttc
Ok I'm day 12 with a ultrasound tomorrow to confirm ov and how many eggs
 I've just got home from work and the bottom test was just taken (2 a day for last 3 days) i would think that's a positive opk but on the instructions about taking clomid dr said to bed  days 13-19 but worried I'll miss ov so I did bed last night and day before and will tonight but worried I haven't followed drs orders she told us they ultrasound to check how many eggs in case to many are going to ov 
​Any advice ???