Well certain medications certainly do affect your sex drive. Sometimes it can be a temporary set back.
From what you've described I'm glad you've seen a psychiatrist.
Your psychiatrist has put you on medication for a reason.
Can you ask your psychiatrist what they believe your "diagnosis", if any, actually is.
Zombie effects can occur when you start out on new meds too. In my opinion, don't give up on the meds just yet because it sounds as if you still need answers.