Confused about ovulation

I had to get a few ultrasounds very close together in the same cycle to make sure I wasn't developing cysts or cancer but I had an ultrasound the day after my period when I was supposed to be ovulating and right before my expected period but what I'm confused about is I had a different ultrasound tech each time and all of them told me I was ovulating (and hyper ovulating) so know I have no idea when I'm actually ovulating, can anyone help?