This is the second time they’ve rescheduled me

So I’m pretty angry…. I’ve had recurrent miscarriages. Few weeks ago I was supposed to go in for an appointment for an ultrasound, only for them to call me to reschedule. Then today I was supposed to have an appointment for an ultrasound, they called me at 7am to reschedule. I explained that this is the 2nd time they’re rescheduling me, now my next appointment will not be til December 22nd. I’m debating on finding a different obgyn.