My heart and prayers go out to you. I feel what you are saying about being under stress and it setting of your bipolar. I managed to get off the Ultram finally and the stress of that with everything going on in my life was driving me totally nuts. I'm already nuts, but totally nuts I do not need.
kidding around of course. I would definitely take care of the kidney first. But, if you are going to be in the hospital you might as well get everything done and they have the best meds around, OK that is a joke to. Seriously, I am in a weird mood right now.
I would definitely take care of the kidney before doing anything else. You don't need to come down with an infection of any kind if you were to get the knees operated on. do you have any kind of other support around, like family or friends? You really need to reach out for help and support. It was great that you came here and expressed what you are feeling. I would also call your psychiatrist if you think that you are getting completely overwhelmed and then could adjust your meds or maybe get into see a counselor which they could recommend one as well. Hope things start going better for you.