20 week scan (TERRIBLE TIME)

So I went in for my 20 week scan today and it wasn't with my normal Doctor. We started with the cervix check and it was normal. But then he started to check my stomach, he was very forceful and it actually hurt. I've read some posts that women say it is due to them being overweight that they have to push a bit harder. But since I've been pregnant I've lost weight not gained. I'm down to 165, I'm not the skinniest but I would think that he wouldn't have to be that forceful. Half way through since the baby wouldn't open its legs he started to push and shake my stomach. He did this three times before I said I needed a break. He had me turn on my side for a few minutes to possibly get the baby to open its legs. He came back in and attempted it again. The baby had opened their legs and was now revealing to us that it was a BOY! 💙 I'm happy to know what I'm having but not too fond of how he managed to get the gender.