I don't get panic attacks any more, mate. I was put on Citalopram (same class of anti-depressants as fluoxetine) when coming off alcohol and I believe that helped me so much. They may take about a week for them to kick in.
Do you have a general anxious feeling during the day? It's just your brain remembering that there was something....some kind of threat/fear. Something that you used alcohol for. It's the brain's auto response. Like it's subconsciously aware of something. Don't fear anxiety or panic attacks..they're just a natural response to a threat. A THREAT THAT ISN'T REALLY THERE, SO THE IMAGINATION TAKES OVER...OOPS CAPS..Once you realise there is no threat and that nothing bad will happen, the brain starts to let go, and you'll feel less anxious until eventually you'll feel confident again. There are some great self help vids on YouTube that explain it so well....and how to deal with them.
Take each day at a time and deal with each hurdle when you get to them. It gets easier, mate. Fuck that shit off out of your life for good...you'll get there, mate.