I would say NO. If they did, my head/brain would be mush. Having said that, after a panic attack, I would also say it would not be unusual to feel "different" for an hour or so - til the "fight or flight response" kicked outta gear, and until you got over the scarey feeling of having just had a panic attack. AND - we could feel "different" for awhile, wondering if we were going to have more attacks, but IMHO, not the "different" you are describing. Do you take meds for the anxiety/panic? Could it be a reaction to a med given to you after the attack that you are now taking? If not, I would suggest a trip to the Doctor to see if there is possibly a medical reason that you are having these feelings.........because of the length of time involved. OR, perhaps you really have GAD, which could explain some of the feelings your describe being almost constant without treatment.

Sorry you are having these feelings ! Hope you soon find out why, and feel better !