IPhone won't turn on because of ios8?

I'm trying to get the ios8 but i forgot to backup my phone before i did it plus i didn't know and now that i'm trying to back it up on iTunes or on icloud it won't let me and i can't turn on my phone, what do i do? It keeps telling me i need to restore it but i don't want to do that, i don't want to lose any of my pictures!

Added (1). what would you do in you were in my situation

I don't know, but that happened to my tablet and I had to hold on the power button for 30 seconds and then press it 1 more time and it turned on.

Anyway, hope this helped.

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