You need to go to your doctor(s), and tell them everything, get blood work, and anything else needed to identify the causes, and may be able correct these conditions, The swollen ankles, frequent urination, can be a sign of the kidneys not functioning properly, but can be many other causes, I'm sure, like diabetes, whole body inflammatory disease, inactivity, water intoxication, not saying that's the case, but some happened to me, so it's best to see a doctor with your history, and something minor, can become major, not to scare you, but for you to see a professional.

You probably need more than 2500. It's based on your height, weight, BMI, activity, medical conditions and from recovery from surgery and treatment. It may be more like 3500, but I'm no doctor or nutritionist to figure yours out, and should ask them. Excessive protein can cause a hardship on the organs, especially the kidneys. Some advocate 1g for every pound you weigh, some say half your weight in protein. Water should be about half your body weight in liquid ounces, plus more depending on your height, the elevation where you live, weather, medical conditions. There are many water app calculators on line to figure it out, but it's easy on your own, advise from medical providers. Consumption should be 80% liquids by mouth, and 20% can be by food. Coffee is a diuretic, so they say for every cup of coffee, drink a glass of water.

Good luck Shawn