IPhone won't let me update to iOS 7

I have a iPhone 4 and I decided to update to ups 7. I started around 6pm and its 9:17 now. I only have a 8gb phone so I had to delete like everything (apps, photos music etc.) after I got enough room to update I let it download for about a hour and a half then it says I need even more room! It required 622 mb but when I go to my usage it says I only have 136 mb available and 109 mb are being used by photos and camera even though I deleted all my pictures. It says that I'm currently using 6.2 gb so I can't get my apps back yet until the updates done. How do I get more mb! I really need help here!

You will regret upgrading.
It will slow your phone down
Make it look dumb
And you lose battery life
iOS 7 really sucks
There's are some nice new features but the User interface of the operating system is garbage.
You can't remove it so make sure this is what you want to do…
Really search the reviews first.
Before you ruin your phone.

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