Cycle length

Did anyone’s cycle change with clomid? I’ve been having cycles around 30 days before clomid, just wondering if I should expect them to be the same, or will clomid force the ovulation earlier and in turn have a shorter cycle? I just had an ultrasound and doc said 2 mature follicles (day 13), and to expect ovulation within 36 hours. I’m just wondering when I can start testing