Macbook Pro 2016 screen glitching

I was in the middle of watching a video, and suddenly my screen starts glitching with horizontal lines (see image).

After going downstairs and crying with stress, I came back to it and the flickering glitching lines had stopped, but when I went on it it started again (and haven’t stopped since)

Can someone tell me what has happened? The laptop hasn’t left the house or been impacted my anything to make this happen. Will I need to get the screen replaced (I know how expensive this is so am stressed). On top of it, I need my laptop for work and there are no genius appointments available near me.