It sounds to me like you should not be dating right now, much less engaging in a sexual relationship. You need to take care of yourself, get yourself well, and only then consider meeting men. You sound very fragile, and not showing the best judgment about this man or the nature of your symptoms. If you feel you need to remain in contact with him, then tell him NOW about your conditions, and let HIM decide if he wants to still pursue the relationship. Postponing this information and continuing intimacy (not good idea) will only complicate things more.
Patty