I miss my h20
I'm going through the same exact thing. I wasn't much of a water drinker before surgery but would still drink it cold especially during a workout. After the surgery I cannot stand the taste! I'm 9 weeks out and can honestly say I've only had maybe 8 oz total. Only way I get my fluids in is if I drink Powerade Zero, Isopure clear drinks, or add Crystal Lite to water.
Not sure why but I am now about 13 months post op and water still makes me nauseous. The only thing I can think is that somehow my tastes are heightened and you are now tasting the minerals that are in the water. Most bottled water states that they add minerals to "enhance" flavor. At this point I find that I can only drink distilled water as that is water with the minerals removed.
I also found that fish tastes fishier.
I think for the first week I really didn't like water. After that I was fine once I realized I couldn't drink it room temperature anymore. It had to be right out of the fridge cold. Drinks had to have ice for me to drink them. It was not something I was used to, my ice trays never saw much action before surgery, now they're utilized on a regular basis. If it isn't that you need to find the right temperature I'm not sure what it could be. Good Luck!