Welcome Amar,
We can’t diagnose here, but your symptoms are indeed very similar to MAV, PPPD or VM.
See Symptoms common to MAV & VM
The derealisation and brain fog is indicative of an over-stressed and confused brain whose vestibular system is not stable.
I’m afraid finding the right medication to calm your system down is a bit of a journey in itself, known locally here as the “med crapshoot” (coined originally here but fully phrased here). I would definitely consider one of the vestibular suppressants, e.g. Amitriptyline, an SNRI like Venlafaxine (Effexor), or try Propanolol. You need to give each drug 3 months individually in any case. Your Neuro will advise, but you should probably be considering an oto-neuro. Prozac is a really silly, even dangerous medication to be on imho. Good you are getting away from that one!
I hope you find the resources and community here helpful,
Good luck with your Neuro appointment!
Lastly, you will get through this, but it may take a lot of fight and it’s likely to take some time.
