20 week ultra sound needed to be done 3x

Need some advice. At my 20 week ultra sound the tech was very unfriendly and hurt me so much prodding that thing into me. She ended up not getting all of the babies measurements because of the positioning of the baby. So I got called in a second time the week after. This time around tech was very friendly and professional but she hurt me also prodding and pushing into my stomach. It was like every time she found my most sensitive spot that hurt she would push down further and leave it there for a awhile. The belly button was the worse. I even heard a pop at one point and was like what was that? That seriously didnt sound right. What the heck. What is with the torture here. So I made it out of that one. But seriosuly thought I was going to have bruises all over my stomach the next day. So now this week I just got another call that said we got more images taken during that one but we still didnt get the right pictures to measure the babies blood vessels that go to the heart due to babies positioning again. But everything else is healthy. Now I am so tired of doing this because of how painful this is every time I go in and it's been giving me anxiety every time. I use to love ultra sounds and now I hate them. I don't know what to do but I just want to tell my doctor to stop. No more. This is just insane. Do you guys have any advice for me on what to do or has anyone been through a similar situation. I feel like these ultra sounds should not be this painful.