Seeking Help for Worsening Anxiety: Need Advice

I feel like my anxiety is getting worse. For the second time in less than a year it got so bad that it was making me physically ill for over a week. I think I’m ready to actually get a psychiatrist involved, I have a call scheduled with a patient care coordinator on Wednesday and I’m nervous. I basically self diagnosed GAD and my primary care prescribed Sertraline and upped my dose whenever I said it was worse. I’m worried a psychiatrist is going to tell me that there is something else seriously wrong with me