Puffy Feet?

Nurse just left a bit ago. All looked okay and/or normal except my foot. Too much swelling in there showing there is fluids that she does not wish to see go from my foot to my lungs. Not sure how that would happen, seems like a strange path to me lol However she was very serious about it and I guess I better be as well. I need to urinate more or she will put me on a diuretic. ugh. Them things will make me pee too much, up and down all night long lol How can I sleep that way? Solution for me is to drink more fluids so that I can pee more and get rid of liquids in my system...