What will I do at this neurologist appointment?

I'll be going to a neurologist this thursday. I suppose they'll be checking for symptoms of epilepsy and ADD as well.
I don't know what they'll be doing, because I am not in control of the situation…I am 14
I was just curious, what do you think they are going to do to me while I am there? Will they have a drug test or anything like that?
Thanks for all answers
Have a nice day
Goodbye!