Will I lose my data if I update to 7.0?

Hi, I have an iPhone 4 and have wanted to update my phone to ios7 for a while now but I can't back up my data because of many issues, I have tried everything and it won't work. Everyone I have asked has told me to just do it but my photos are very important to me and I don't want my phone to be wiped. Should I update or not?

Before suggesting alternate methods to back up I seriously mean it when I say I have tried everything haha!

Yes or No? What's the difference anyway?

If your updating from the iphone itself and jailbroken your will get bricked and then you gotta do a full restore (lose all data). What i would tell you to do is try it on a different PC. If that didn't work download a program called iexplorer on PC. Access your phone files through it. Open it and connect your device. There will be photos and video tab, click on it and will show the media you got in there. Now just select all files (ctrl + A) and drag and drop to a folder on desktop. Thats it really. Hope this helps and good luck.