Just keep on watering it. it will come back up

Awww, so sorry, looks like it was really full and pretty. If it perked up a bit, there's still life there. Some of the leaves may be lost, probably too early to draw any conclusions. Just don't overwater it now, that would just add insult to injury.

Just water as usual. If we are dehydrated we cannot drink too much too fast or it will cause us harm, the same goes for plants. Just keep testing the soil. Most of the plant should comeback in time.

In the future if you go out of town for a bit you could buy a self watering globe from a dollar store or the like. Works great!

Tuck

I heartily concur with the above comments:

1) Man, that sucks about the damage. D': I've been there. My peace lily is an offset from a a plant older than I am by a year, and dates to the funeral of my great-grandmother. So it's intensely sentimental, but also just brings me joy to see it happy and fluffy.

2) Don't overcompensate with watering now! I've also been there. It won't help, and would quite likely hurt. Please heed Tuck's advice to water as you normally would.

I can't begin to tell you how many times I've done that to mine and I didn't even leave town. Unless the stems are kinked, they will come back up.

Do not overwater.

tj