I had my first ultrasound at 7 weeks, since that was when I found out it was ectopic SO glad I want wasn't scheduled for 14 weeks I'd have ended up in the hospital. Ask your doctor to reschedule or get another doctor. For today: disolving B6 and unisom for your nausea. Separate they are over the counter, the perscription form just combines them. Also whatever form of ginger you like best. I drank a lot of ginger beer. This is terrible and I hope you get support soon!
Definitely get another OB or ask for an early appointment. 14 weeks is way too far. I had an ectopic pregnancy at 9 weeks and my OB despite me telling her I didn't feel good and had bleeding she didn't listen and I eneded up in the ER where I was rushed into surgery. I know they usually don't want to see you earlier than 8 weeks because they may not be able to see anything, but at 8 weeks, you should absolutely get one done. Your 14 weeks scan should be more in depth with a specialist. My OB is sending me for my 14 week scan and then seeing me the next day.
I'm in Canada, I believe we get transfered to an obgyn around that time but started with my family doctor immediately (around 7 weeks)