I would admit to being a client, but in no way would I ever divulge my Dx. I'd just say I was a client and leave it at that (basically what you did).

Anyway, like others have said, there isn't any particular "look" that screams MI. It's behavior that does.

I dress casually all the time and I look like other people my age. I'm also able to control my symptoms quite well. You'd never guess I was BP or that I even suffered from MI.