Hello, I experienced something similar, and still kinda do.
First off, don't accept this as the "new you", don't accept it ruining your life.
Fight it with all you got, try medidation, diverse your mind from it...
Think like this: everytime you think about it, you feed it, you gotta starve it, so pay it no attention what so ever, just forget it.
I know this seems impossible, I was in the dp/dr state constantly for 2months in a row, then I started diversing and it helped, a lot.
So basically me being in this forum is like asking for it, so i'll leave now cause I feel it slightly coming back... So just diverse it.
If you have panic attacks, when they come, fight it with all your powers, learn that your the one controlling it, then the next time you feel f'ed-up, start counting backwards from 100 - 0, or do math in your thoughts, just to keep your thinking busy.
Don't let it crush you =]