SSD is gone and not detected

[HeroRT]

I was playing a game when suddenly my pc ran into a problem and restarted itself. After rebooting i didnt notice that it was gone but when i went to "This PC" i didnt see it. i went to Disk Management and its not seen. there is a weird Disk that hasnt been there before or so i think that shows Unallocated and its only 20 MB my ssd was 120gb. i need my ssd back

 

[CountMike]

See it in BIOS ? What about Device manager ?