I'm not sure if I have anxiety or not but I think I do? I shake my leg mostly everyday when I'm in bed (without me even noticing) I overthink a lot, I feel trapped around people & get nervous and sweaty I have to go to the bathroom sometimes to calm myself down a bit. Idk what i have help how can I know if I do have anxiety? I'm 16 and I will be going to a mental place I forgot what it's called but what should I expect when I go there? I'm really nervous to go idk what they're going to ask me etc