I moved your thread to your device forum, with a redirect from the AL section, so you'll get the best of both worlds for the next few days, hopefully someone with the same device will be able to help and guide you, cheers

If you were connected to Google, your pictures bight have sync to the web, you can check that. Now if you had an SD card, there are many apps there that might help recover your pictures, as to which I am sure others will offer advice on. If your pictures were on the internal memory, then there is not much you can do.

Once you come and find a solution, your next and best bet is to do a factory reset, to make sure you don't have a rogue app, or something else messed up on your device.

If your pictures are not on the web in Gmail, I suggest on the next go around, that you do sync them in your pictures in Gmail. Always good to have a cloud backup for times like this.