First of all sorry for my English as it's not my language.
I've gotten panic attacks nearly on a daily basis since 2008 but it's because of a fobia I have with my health. After it's been kind of "under control" I kept on having panic attacks and it was pretty bad at uni to the point of skipping 1 full year just because of fear to go there.
Later I got a job and since I was forced to go out and interact with people they kind of went away for the most part, I'd still have them but not as frequent. However for the past 2 months my online business took off and I was forced to quit my job and stay at home and work all day however this took a big toll out of my "mental health" because now I avoid going out as much as I can and if I HAVE to go out I'll be shitting myself for the beginning of the "trip" to the point of which I wish to just pass out or something so I don't have to keep experiencing that. I've got some money now which I'm really grateful for and it allowed me to buy "the car of my dreams" however the anxiety is so bad that I can't even drive it.
Riding helped me a lot since I started going out with friends, even if it wasn't very far however lately I find it hard to get the bike in the car and travel like 5km's to a rock garden and ride there because I think that I'll be feeling super bad if I even try to go (despite having been there many times before).
I find it that panic attacks don't really ever go away unless you FORCE yourself to live somewhat of a normal life, If you don't have many friends or something to go out then make excuses to go out, go to the supermarket, talk to the cashier, go downtown and go shopping, just force yourself because otherwise you won't have much of a normal life. That's pretty much what the "linden" method explains about dealing with panic attacks.
Invite friends over, invite people to ride with you, literally force yourself to do it.
I know that 70% of what I said didn't make sense but the little bit that it did, I hope it helps.