Hello! First time posti
First and foremost, do NOT under any circumstances submit anything to the AME unless/until an expert on FAA SSRI issues says you and your paperwork are ready to pass. That means someone like HIMS (Human Intervention Motivation Study) AME Dr. Bruce Chien (www.aeromedicaldoc.com) or maybe some of the folks at AOPA medical. If you don't have all your ducks in a row on initial submission, you may never be able to get in the air. Meet with your AME if you want but do not submit anything until you know you meet the FAA's protocols for issuance, and the average (i.e., non-HIMS) AME isn't that familiar with those protocols and the approval criteria.
Fortunately, Lexapro is one of the three SSRI's for which FAA medical approval may be obtained. Unfortunately, Clonidine (Catapres) is not. The fact that you've taken it in the past may complicate the approval process.
Here is the FAA's guidance on initial medical certification with an SSRI in your history:
WARNINGS: This will not be easy. This will not be cheap. This will not be covered by your health insurance.
You need an expert, like those I mentioned above.