Inverted Screen (negative and bright colors) after Replacing Glass

I am having major problems with my phone! A few months ago, I cracked my screen. It worked totally fine, in fact I used it for like 2 months even after it was cracked because I could still use all of the features. When it got to the point where glass was chipping off, I decided it needed to be replaced. A good friend of my husband replaced it and it worked perfectly when he was done. About a week later I dropped it and the screen went blank. After charging it, it wouldn't turn on, but my alarm still went off and I could click the screen and hear it- just no display. It turned out that a wire just came disconnected and our good friend fixed it. THEN, another week later, I dropped it again (I know I'm horribly clumsy), but this time it wasn't even a foot off the ground. It was dead at the time and when I charged it and turned it back on, the screen looked really funky. All the colors were inverted and I could barely see anything. There is also a slight shutter/flashing in the background that makes it hard to see anything on the screen. I can still see everything and use it, it just isn't idea because all the colors are messed up and I can't see pictures well. Also, when you click on something new (for instance going from music to messages), it takes a few minutes for the previous image to fade. So when I am in music and then switch to messages, my messaging screen appears, but the music screen appears transparent in the background and then eventually fades. It's very odd. So we told our friend about it and he said a wire was probably just disconnected. We took it apart, but couldn't see anything really so we put it back together. THEN, there was this black splotch on the top right of the screen! What the heck. SO at that point I didn't want to mess with it anymore and make it worse. Does anyone know what the problem is and how I can fix it? I have looked at SO MANY posts and I haven't found a solution yet. I have tried changing the black and white setting and turning it on actually makes it easier to see things. I have tried hitting the home button three times in a row. I have tried a hard re-set and none of that works!! I am wondering if there is a wire or ribbon lose, or if I need a new LCD. However, I took a screen shot and put it on instagram and on instagram the picture was totally normal... not distorted or anything. So I think that means it is the screen not the hardware. Please please please help me!!