Withdrawal of psychiatric medicine.

I am having zaptra 25mg and ativan 2mg from past 5 years. Recently I got diagnosed with type 1 diabetes that came in range of more than 300 for fasting. I have 2 questions My first question is whether my medications can in any way be responsible for my diabetic condition? Another question is Is there a way to withdraw my psychiatric medicine completely? I am also developing other complications related to it since I am still young and recently married. I didn't knew about the side effects much and now when I know about it I want to help myself by withdrawing these medications. How can I withdraw? Whether I should go for lowering dose slowly or taking up a new medication to a less addictive one and then go for withdrawal