Bottom of laptop screen has vertical lines?

My laptop started to have these lines on the bottom of the screen. It’s mostly vertical lines that can still show the toolbar sometimes, but it “remembers changes? Like if I leave the cursor there for a while, sometimes the image of the cursor stays even if I moved it already. Sometimes it gets super blurry, but right now, I can still see the toolbar.

It also kind of “reflects” what’s happening above it?

Sorry for the dirty screen. I’ve been using it with an external monitor connected and it works fine, except for like…episodes of flashing?

As I was typing this, it got “blurrier” again.

I also tried what someone posted earlier about pressing on the sides of the screen, and nothing changed.

I was wondering if anyone could tell me what’s wrong with my laptop and if this means I need to get the screen completely replaced or if it’s only a connection that has to be fixed or something?

Thank you so much!