Glad you found this site, I am new on here and have beem greatly supported already!
I can empathise with how you have been feeling as i have been suffering extreme anxiety and panic for some weeks now and it became unbearable. I also hav GAD and have had it for years. I would be convinced that i wouls have a certain illness as would have the pains that were very real for ages. I had one particular prob that lasted for months and when i eventually got referred to a specialist who gave me the all clear it went away that afternoon when i got home!! Amazing, anxiety can be so powerful
Unfortunately i would end up developing some other prob because anxiety needs to be addressed before these issues start to slow down. But as always when i get the all clear and really believe it the pain or symptom gets less or goes away!
Are you on any meds for your anxiety?
Stick with your breathing and reassure yourself that this is anxiety not YOU!!
Am happy to talk anytime