SD card from camera & connected to mobile phone lost pics

I took pics in my camera and I remove the SD card from camera and connected to mobile phone by the help of otg then the images shown in the mobile phone after a few seconds the images is vanished then I used computers and some recovery software's for recovering that hidden files the files is not deleted the storage is shown full and no images I think the pics is harmed by viruses please help me the images is more valuable