When did you drop your phone..?
Take out the battery immediately and let the phone totally dry first for a few days. Some ppl chuck the damp phone into rice but I don't know whether that way effective or not.

After few days then only you put back the battery and power it on and see whether the phone still okay or not.

Btw..water damage not covered by warranty.

It stated at the warranty card...lolz
Inside the phone there's a water indicator strip where it turn colour when wet.

Anyhow the service centre still can repair any damage but you have to pay for it.

Hope nothing internal damage badly. That's why need to take out the battery immediately after the phone went into water. To avoid any ic short circuit and fried inside.
Anyway..wish you the best bro.