Mood Gym is awesome!
I agree I don't really get why a) your parents won't let you take care of your health and b) you don't just go anyway?
Is there a reason you tend to tell everyone about your self-diagnosis?
I have GAD but maybe only have a full-blown panic attack (when I'm stable) maybe once every 6 months. However panic attacks really vary in intensity depending on the person. For me, they are so bad I pass out and am ill for a few hours.
If you feel you don't want to go to the doctors you could always use CBT stuff online or go to a library, if it's stable enough without medication then you prob don't really need to see a doc.