My iPhone won't show photos?

I was taking some photos from my iphone camera and once I went to photos, they weren't there. Everything I took before was there, though.

I took about 20 new pics, and in the camera roll it says (1420) but once I press it and all the photos are shown, it says 1400 and the recents are not there.

Does anyone know what could be the cause of this? How to fix it besides resseting the iPhone? (I don't have access to the computer with all my iTunes info.)

Try turning your phone off and turning it back on and see if that solves the problem.

If not, contact Apple support.

I have done that mulitpy times and it works for a little but as soon as I leave the app the photos go again

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