So prior to having the pot-brownie you didn't have panic attacks at all? I know having too much weed can make a person tweak out and have a panic attack but it usually doesn't happen again unless they have too much weed again.
I can't think of why you'd continue having issues if you're not using weed if you didn't have issues prior to that.
Or are you just now really freaked out bc they deceived you with the brownie thing and now you question everything and it's making you anxious and making you have panic attacks?