Hour and a half long ultrisound

Ell • baby boy 5-4-19| mom to an angel baby feburary 20th, 2018

I had an elective ultrasound yesterday to determin babys gender and it took the teck an hour and a half of trying to find out what little one was because they had their legs crossed. I have to go back Friday to try again. my question is did I harm my baby by exposing them to the ultrasound for too long or am I over reacting?

Well baby worked with us Friday and were having a little girl! Took about another 30 minutes though