Oh my goodness. Yes, prayers are certainly coming your way.
Now I have my armature concerns here. Like most water, even filtered water, is not really alkaline, but is somewhat acidic, so drinking all that water makes me wonder how you will stay alkaline. Being alkaline is so important for our overall health. There are ph strips you can buy at places like Vittcost and health food stores. They let you know, based on urine flow, how your ph is. I do know that Evian spring water is alkaline - but most spring water is not. But it would be very pricey to drink just that.
I personally stay alkaline with citrus juices, vinegar, alkalizing herbs, sweet potatoes and wheatgrass juice powder in smoothies or in my o.j.
Also, too much water can deplete your electrolytes. Maybe the medical staff has alerted you to all this, but I am sort of a mother hen who worries a lot for others. We gotta have adequate electrolytes to function well. But maybe you have researched all this already. Just sharin'.