Q: all my pictures got deted on my iPhone 5s I don't know how

Can you give a little more information about your setup:

Do you use iCloud Photo Library (iCPL)?

Are the photos showing in iCloud.com>Photos on Safari?

Is your phone backed up in iTunes?

Do you use a computer with the Photos app??

If you have a computer, do you see the Photos library in the Finder>Pictures folder?

Do you have backup of the computer, eg Time Machine?

If you have iTunes backup, I suggest you go into iTunes Preferences and right click on it to, archive it, so it doesn't get overwritten.

As putnik said you didn't give use enough info

Sorry to here it, but here is what you can do to prevent this from happening again

About backups in iCloud and iTunes - Apple Support

And use one of these ways to save your photos

My Photo Stream FAQ - Apple Support

or

iCloud Photo Library FAQ - Apple Support

or

Import photos and videos from your iPhone, iPad, or iPod touch to your Mac or Windows PC - Apple Support

Best of Luck

Can you give answers to my other questions, it would help to know your setup.