So for the past few years I've been going to my head of year with my stresses and recently she took me out of lesson and she said that she's been speaking to other (more experienced) members of staff and she believes that I could have an anxiety disorder and possible depression. 

She recommenced that that I should make a doctors appointment to get a diagnosis and some counselling along with some medication dependant on the diagnosis.

However, i'm now 16 so legally I have to make my own appointment, and the irony is i'm too anxious to make an appointment for an anxiety diagnosis. So now I don't know what to do because I've been feeling anxious a lot more recently in random situations and I've had a few more 'panic attacks' (I don't know if they were panic attacks but I don't know what else to call it.) in the last few days so I clearly need some form of help but I don't want to ask for it.

What do I do?