It is your responsibility to make sure all your medical records are in your SS file. Is this something your attorney should have told you? Yes. But they often are very hands off. You should request a copy of the hearing from your attorney. It'll be either electronic or on a CD.

You do need an answer from your current attorney if s/he wants to continue representing you, because I would recommend interviewing new attorneys if not.

At this point, the attorney will be looking for a legal technicality in order to have the AC remand you back to the ALJ.

You probably do need need more medical documentation to eventually be approved.

Going in without having taken your meds is not the way to prove how low your function is. Making an appointment later in the day and keeping busy beforehand, would be more reasonable.

Undergoing a Functional Capacity Evaluation would be a good idea and then having your doctor use that to fill out a Residual Functional Capacity Form. In other words, you can't guess at how you'd perform, your doctor must document it and preferably have tests that will back him up.