Hi! Firstly I should appreciate the way you have so nicely described your symptoms. Please understand that the very nature of panic attacks says that they can occur any moment , and can occur even when you are not physically active. If you are prone to having panic attacks, any mild stress
will make you have a lot many panic attacks. If its causing distress to you,you should surely visit a psychiatrist
who would like to start you on some medications along with psychotherapy
. The main information which is missing out in your write-up is your current age.if you are old aged, you should also get yourself checked by a physician and get an ECG done , just to be sure that we are dealing with only the panics.
Hope this settles your concerns.