How many ultrasound is too much?

Ruska
Hi, I'm 16 +2 weeks and have already had 4 ultrasounds due to complications, they were thinking i had ectopic pregnancy and were checking in every week during 5-8 weeks. the last one was at 12 weeks. Next app is after three weeks to detect sex. But I cant wait and want to do privite one to detect the gender. Do you think its too much and could it be harmful for baby? Thanks.