Pissed off!

This is the 3rd time i got a last minute cancelation call about one of my scans. It happened in my first pregnancy at my nuchal last minute cancelation and I had to rush to book something for myself elsewhere then my nuchal with this pregnancy and i had to again quickly rebook my nuchal and now my anatomy scan!!!😠😠😠 wtf?! They told me that the techs schedule changed but like every time? Then I find out the tech is going in but they probably just overbooked and keep bumping me out. I'm so pissed! And seriously considering switching Drs they told me the anatomy scan can be done at any time and that I can book again in 3 weeks! I have a stupid subchorionic hematoma that I wanted them to check to see if it's getting better and I waited so long for this scan and like 3 times?!😡 uch so disappointed did this happen to anyone else?