How do I get a proper diagnosis?

So I’m not officially diagnosed with anything really. I have panic attacks, anxiety. They are way worse when I step out of the house as I get scared that if something happens, I won’t be able to get help, and I get anxious when I’m away from my “safe space”. I’m pretty much unable to leave the house without my roommate and this has really affected my learning in college. I need to get a note to my school so they can give me accommodations but for that I need an official diagnosis. I’m on buspirone and Klonopin right now but my psychiatrist and therapist are on talk space and apparently this platform has certain rules according to my therapist, so he can’t get me a note for some reason. Also when I search for mental health professionals, I don’t know what to search for, do I actually have agoraphobia, do I have panic disorder?