How to get my audio to work on my iPhone?

My volume doesn't work AT All an it's driving me crazy I can't listen to music and can't hear any incoming calls or texts. Sometimes it'll work but then it says the headphones are still plugged in and they aren't. I need help it'd be really nice if I wouldn't have to pay for a new phone. I'm saving up money. Earlier today I did drop my phone in the snow but here the snow isn't all wet and slushy so that wouldn't do much would it? Anyways I need help:-/

You may want to reset to factory settings.iPhones can become problematic when exposed to water.

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