First of all, call the landlord about the check on Monday. You don't need to be worrying about that right now.

Unfortunately, you do have some medical problems that don't make the conditions for a procedure/operation ideal, but you can't change any of those things now
The truth is that most patients undergoing these types of procedures also have multiple medical problems, so surgeons are used to dealing with those kind of issues already.
I remember you said the hospital you will be having it done at has a very good reputation. You may want to look for your doctor's profile on their website, or elsewhere on the web, to see his credentials and read about his experience. The more experience a doctor has, the more prepared they are to handle problems if they arise. It may give you some comfort

I have a really hard time crying too, Bobby. I know it's a good release, and you could use that right now

Hang in there