How to lose water weight

Hello! I would love some advice on how to shake this water weight!

So I’m currently on a 1200 calorie diet. I drink 64oz of water each day plus two protein shakes. I’m painfully bloated. A caveat is that I take lithium (which contains sodium) twice a day, and I can’t take a diuretic to lessen water weight (because it would put too much of a strain on my kidneys). I also take risperidone. I’m trying a low carb diet but am not sure how long it will take to see results.

How can I reduce water weight? Any and all ideas welcome! Thank you!!