What to do if water is the problem?

I usually drink water to ease my Gerd because it'll burn so bad sometimes, keeping me awake at night. Tonight in particular, I was woken because I drank Evian water. This is the only time I've ever had Evian water and I didn't think much of it. It's water. Unfortunately, I've now got a massive bloated stomach and my burping/nausea is horrible. Note to self, avoid Evian??