iPhone 5c screen problems after dropping, discoloration

I dropped my iPhone 5c a few days ago. Right after I dropped it I noticed that the top left corner of the screen is coming up. The day after about 1/3 of the time i would unlock it I would have to press on the top part of the screen to get the phone's display to look normal. Now, the phone's screen only functions like normal when i press and hold the top part of the screen (around the speaker) while unlocking and using it. I can;t go to apple because I had already replaced the battery myself (which was successfully completed several months ago with no problems) and I currently don't have money for a new phone. Please help!