I went to the doctor for a check up on the 19th, our next check up and our gender scan is on the same day (28th) but our check up is at 12:30 and Our gender scan is at 4. I'm 17 so I'm still in school, and I have so many early sign outs because of doctor appts and I risk losing credit and not graduating if I keep leaving early. I want to cancel the check up since I just had one a few days ago and there's no need for 2 in 2 weeks but the office gets so pissy when I cancel and they won't schedule me again for like 2 months, what should I do?