What are the ways to manage the withdrawal symptoms of Benzodiazepine and Alprazolam?

Hi doctor, I took Benzodiazepine Alprazolam for insomnia for 2 months for a total dose of 30 mg, while stupidly attending college parties and binge drinking once a week during the period (I have never taken the pill on the day I was drinking). I did not take the drug every day and after roughly two months I quit the drug altogether, the withdrawal, that I did not recognize at the time, kicked in (Extreme tinnitus, sweating, heart racing, heightened anxiety). I went to ENT doctor and she gave me two Dexamethasone injections in 3 days (I think 8 mg). I developed during these 3 days a major loss of short term and then long term memory, trouble finding words, trouble learning in general. The physical symptoms of the steroids and benzo withdrawal went away in 2 weeks. It has now been a month since I feel physically fine, but the cognitive issues persist and they do not get better at all. I have been to a psychiatrist because I felt overwhelmed that Iam not going to be able to finish school in such a state and she gave me Escitalopram thinking it could be psychological, but there is no improvement in cognition after a months use. Does that combination have that drastic side-effects and could it caused a chemical or structural problem in brain? What can I do to return somewhere close to my old self? I am 24 years old.