Do I just need to get a new one

I dropped my iPad numerous times and the screen cracked. Pretty bad. And I got bored one day and started picking at the glass which came right off. Now there is a pretty big hole in the bottom left hand corner and I can see a screw. And a big hole starting at my home button and continuing to the left. It's been working fine until about 2 weeks ago when the screen started spazzing out and making motions on the screen (deleting stuff, opening apps, moving the screen) it was almost as if a ghost was using it. Then i noticed the other night the whole bottom half of my screen wasn't working at all. It's very frustrating when you cant type or press anything at that area. Ive tried turning it off and on again and I've tried RESETING it, i even did the iOS 7 update to see if that was the problem but nothing worked at all. If anything it made it worse. Do I need to just get a new iPad :( or is there something i can possibly do to fix it without buying a fix your own kind of thing offline.