Ultrasound question

Brittany • Thomas Eugene 👶🏻💙 Baby #2 coming soon! (Hopefully)

I am currently 19 weeks pregnant with my first it’s a boy he’s my rainbow baby after loosing 2 (before I was due for my first ultrasound) I have had 4 ultrasounds so far one initial one at my doctor to confirm that there was a baby I was 9 weeks at the time I had my second one at 14 weeks at a special place near me that does 3D to determine gender 2 weeks later was an unexpected ultrasound at my normal doctor because they couldn’t find his heart beat with the doppler so they had to do a really quick ultrasound maybe 10 minutes tops to make sure his heart was still beating all was well he was just hiding and I just had my return session today today at the 3D place because he was stubborn the first time around and we couldn’t get good pictures of his face lasted maybe 30 minutes or so I have my anatomy scan next week and I’ve been wondering if having to many too close together is safe i figured in my brain tho if they weren’t safe then they wouldn’t do them anyone able to help me out here I’m just making sure that what I’m doing is safe and I don’t go over board I’m just worried about my little bean with this being the first one I’ve been able to see TIA (ps here’s a little picture of my sweet boy for everyone)