I Been Dealing With Pseudo Tumor Ceribri And Now My

I been dealing with Pseudo Tumor Ceribri and now my Doctor is looking into my condition and saying that I POSSIBLY have Diebeties Inspicticous - water diabetic along with Acid reflux and sleep apnea . all of these things are scarey Iam only 35 years old. I drink 4 gallons of water a day and im up all night stressed and drinking water along with being overweight. I would like a second opinion on the water diabetes what do you suggest i do with all that i have going on?Can any of these things kill me?