Macbook pro 2018 screen flickering black with vertical white lines from top.

My macbook pro screen flickers black with white vertical lines. It's been going on for a while and getting worse. I've tried resetting SMC, NVRAM, i've also tried reinstalling MacOS updated to the latest version and nothing seems to fix the problem but it has gotten a little bit better after reinstalling MacOS. When I start up my mac in safe mode it doesn't have this problem, the screen works fine then. I've tried making another user this doesn't fix it. When I watch video or move my mouse the flickering stops. If I plug in an external monitor it doesn't flicker on the external monitor and it still flickers on my macbook screen but a lot less frequent. If I play music it flickers to the beat. I've also cleared all caches this didn't help either. Does anyone have the same problem? It's a MacBook Pro (13-inch, 2018, Four Thunderbolt 3 Ports). Updating MacOS didn't change anything.