Why is my screen discombobulated after I replaced the glass?

I have an HTC Desire 510. My screen cracked recently and I purchased a new one, thinking I could replace it as easily as an iPhone screen. I did successfully replace my glass after a lot of headache, but now when I go to enter my PIN to get into the phone, my touch presses the numbers wrong. For example, I go to press a 5 and it presses the 2. If I press the 2 it hits the 'emergency call' button. I've managed to get into the phone and change my PIN, but I can't use any of my apps because while the display is fine, my touch is recognized in weird places on the screen, and sometimes it 'recognizes' a touch I didn't make. For the love of God, how do i fix this?