Sonogram-bigger belly

Natallia
So I'm 29 weeks pregnant now. Two months ago I've been told baby's belly is bigger that it should be and that I have to come in for a follow up sonogram in few weeks. At a follow up sonogram I had anothe technician who was seriously surprised I had to follow up and everything looked normal for her. But again I was terrified and googled the issue. 
So it comes out that's the way they charge your insurance extra money - your extra visits! 
I'm so so pissed! Cuz you know how it works with us - future mommies! This whole story scared the sh out of me!!! 
Oh and btw after my 28 weeks sonogram I've been finally told everything looks perfect.
Anyone else had the same situation??