I don't think there is a rule about how much water is too much, it depends on the person. The thing that i do know is that during the summer they are always telling people to drink gatorade to replenish their electrolytes. maybe you can look it up on webmd.
Also, if you end up having to go through extra tests, a lot of hospitals will let you do a payment plan (been there, done that)! They just want their money so they will do anything to get it, when i was broke, they let me pay 20 a month on an er visit!
I am a nurse, i will have to look into tendon issues for you, i will look for a drug book at work next time.
oh, and you do not want to hear me sing but i do like that song!