First off, just know that your apprehension is normal and is a story you will see many more times on this forum. When I finally came to grips with the fact that there was something more going on and that I needed to see a doctor, I had many of the same feelings.
The first call I made was to a therapist and the first thing he did was give me a questionnaire where I answered yes or no to about 100 questions. After spending the next hour talking with him and going over my answers he gave me homework, which was to call my doctor that day to set up the appointment and to actually see the doctor within 24 hours.
I made the call from the parking lot of the therapist’s office and was told that my doctor was on vacation. My heart sank and a million negative thoughts started running through my head. I asked if they had any doctors that they were affiliated with who could see me that day or the next. After checking, they found a doctor in another office but couldn’t make the appointment for me so I had to call that doctor. As I am sure you can guess, I didn’t want to make the second call because it was hard enough to make the first.
I made the second call immediately because I knew I wouldn’t if I waited and I booked an appointment for the next day. The anxiety I had on the way to the appointment and while in the waiting room to see a doctor I had never seen before was tremendous, but I stayed. When I met with the doctor, the first thing he did was to give me a questionnaire with 100 questions to answer and I spent the rest of my time going over my answers and he prescribed the medicine that was suggested by my therapist. He also gave me homework which was to call my regular doctor and see her first thing the next week. I booked that appointment from the parking lot because I knew I wouldn’t if I waited.
When the next appointment rolled around, I was given the same questionnaire by my regular doctor so it was actually starting to feel normal. Especially because all three had the same diagnosis, depression and social anxiety.
You did the hardest thing which was admitting you have something going on and made the appointment. Now, you HAVE to keep the appointment. Your doctor should do something similar to what they did with me which is really just running down a checklist to see what’s going on. It was a very objective process (really just a depression algorithm) and it should be the same for you. If it isn’t, it will suck, but find another doctor because no one knows you better than you.