Too many ultrasounds?

red • ♡
Anybody worried about the effects of the ultrasounds? I have had 4 and I'm 13 weeks. I had 2 dating scans (baby was too small the first time), the NT scan, and had a scan today because I have been having pains. I have a private one scheduled for the 31st to find out the sex, but now I'm worried about having too many. Thoughts?