My iphone 4 keeps on crashing?

So, it all started today. All the apps on my phone keep on crashing and if not automatically it would freeze then crash. Every time I try to use any social apps (Facebook/Tumblr) my dashboard/feed won't load, whenever I go on safari it will also crash and my tabs end up deleting on its own (?) and my history won't save, my mail won't load either and when I tried to edit and save an event on my calendar it said "Saving error has occurred".I'm also having trouble sending text messages.
-My phone isn't disconnected, I payed my bill this month.
Does anyone have any idea as to what is going on with my phone? What should I do? Are there any solutions? Has anyone experienced similar problems, what did you conclude from this problem?
Note: A few days ago I was using my phone and the screen got a bit wet and I immediately dried it off. I was thinking that what happened to my phone was probably the problem. But, wouldn't the effects of my phone getting wet be shown much sooner? Do you think my phones screen getting wet is the problem?
I really need help! I know this is a long question but I really need suggestions and advice.

Double click the home button.
Hold down the apps that appear until they shake.
Close out of them (not deleting)

Try restorin your OS, its os issues

Restart it or update the new version!

No Wi-Fi, no service? Maybe?

If i were you- i would take it to the apple store for a free appointment. They will tell you what is wrong with your phone.

It probably caught a bug, though (or a small virus)

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