I'm afraid only a tech that can open the laptop can help, for example by replacing the screen. But it's quite well possible that more needs to be done and it becomes too expensive.
As a start: what happens if you use an external monitor?
This morning i dropped my pc on the ground, i took a quick look and everything seemed fine. Later when i tried to open an app (discord) the screen in the app was broken. All my apps and games break the screen. They also slowed down and crashed. My laptop model is Acer Aspire E5-572G and about three years old. Please help!