Joe,
My son at age 15 has not been able to go to school due to anxiety either since beginning of the school year. His grandpa died this summer and he went into a depression and then anxiety disorder. We are still trying different things. Medication is important-- to find the right one and the right amount. Don't give up! We also have been pursuing Naturopathic treatments from two different Naturopathic doctors with some help. Make sure you get complete blood work through the M.D. or in our case, the Naturopathic doctor to check on various things--including blood sugar, testosterone, thyroid, etc. We did get some answers from a "Saliva test" through the Naturopathic Doctor that can test among several things, a "Stress Hormone" called Cortisol. This saliva test is not hard to do (he just went off all meds for 48 hours before doing the testing). This saliva test checks these levels throughout the day.
We discovered that his cortisol (stress hormone) was extremely low and could be a part of his problems. We are still treating for this. Don't give up. You are not alone. My son, too, worries about not being with his friends. He just wants to "have his life back." There is no magic pill for this problem. I know one other teenager who had the same problem like you and my son--can't get out of the car or can't even get out the front door. She now takes Adderall for ADD which helps her. My son also takes this. This other teenager (19 yrs old now) works a decent with animals and seems pretty happy--even though she couldn't finish high school. She says she will eventually get her G.E.D.
I would encourage your parents to explore some other options in the Naturopathic field too. We are blending Medical treatment with Alternative treatment to do whatever it takes. Look into something called Seasonal Affective Disorder (S.A.D.) if you leave in the Northwest (lots of dark and cloudy days). We bought an Ott light for at home to help him in case this is a factor.
I hope your parents are patient with you as it is hard for others to understand. Just don't give up and getting better. When you have growth spurts, puberty and anxiety problems all at one time, sometimes it doesn't balance out quickly. Good Luck and God Bless.