Pelvic ultrasound

Hi looking for some advice. 
I have been having problems for nearly 2 years, severe abdominal bloating, extremely heavy periods and clotting been going to docs on and off I had an ultrasound a year ago vaginal and pelvic turned out to be cysts, I had another scan today but it was only pelvic  is there a reason why they wouldn't do both? 
 

thanks