IPhone screen messed up? Black and white stripes?

Please READ FULL PARAGRAPH. Okay so I was on my iPhone 4 on the app Snapchat looking at someone's snapchat and then the screen froze on the snapchat for about 15 seconds and then rainbow stripes were all over the screen, then it went white, then black and white stripes appeared, then my phone went off black (It's not completely black like when you lock your phone, just a bluish black) I've held down my lock buttons and home buttons and a bunch of things but nothing will work. My screen isn't cracked and never has been and I haven't dropped it in water or anything like that. My phone was fine a few minutes ago. It's been like this for about 20 minutes. I'm really scared and really need my phone fixed. What do I do? Do I have to get a new phone? Sorry if the things I said that are happening to my phone don't make any sense. I'm really confused too.

IPhone stuck in headphones mode? - 1

So my friends had this miraculous idea of ambushing me with wear balloons, and my phone was with me, it didn't get very wet but obviously wet enough. I already tried a hard restart, and plugging headphones in a few times (which work when plugged in) but it won't go back to the normal setting when they aren't plugged in. Is there anything else I can do or do I have to take it to the apple store?

Free iPhone apps that let you listen to any song?

Is there an app that lets you find any song and listen to it or maybe make a list of songs and listen to them? I had the spotify premium trial but I don't want to pay. I'm looking for something similar.

Can you text on an iPhone 5s that had a locked icloud but you unlocked it?

So I'm about to buy an iPhone 5s on eBay but it says "Icloud locked" in the description. I looked up a video on how to unlock icloud & figured it out but I wanna know if you can still text on the phone even though you can't use majority of the factory installed apps, can you still you imessage, face time & call & internet?

Why can't my iphone 5s connect to my computer?

Every time I plug in my phone to my computer nothing happens. Anyone had this problem before? Seriously pissing me off I been wanting to change my music but I can't. Someone please help:'.

IMessage in airplane mode with Wi-Fi on?

I have an iPhone 4s, I'm in Turkey (normally in America) I have airplane mode on so data doesn't work but I have Wi-Fi connection. I'm able to use internet and social media, just when I send an imessge it says you have to turn off airplane mode or be connected to Wi-Fi to send and receive iMessages. I'm connected to Wi-Fi and I can go on the internet and everything.
My sister has an iphone and she can send iMessages on the Wi-Fi just fine.

What do I need to do?