The screen is either black, white, or gray on the right side

My tablet, not sure exactly what kind I only know it's Verizon and an android, was in my back pack for about 3 and a half hours. I took it out and the screen is either black, white, or gray on the right side, about a third, and the rest of the screen will occasionally work, but is usually purple, black, white, and gray, two at a time in vertical lines (all of this from a vertical point of view). I've left it in my bag for longer periods of time, and I've never had this problem. I have, sadly, no warranty on it. I can't do a hard reset due to the screen being completely trippy-fun-time. I've also tried turning it off with the "power off and reset" option in the fleeting moments I had to do so, and I also turned it off and manually re-activated it. Please help! I tried to be as specific as possible!