Why wont my MacBook Pro turn on even after force turn on

My MacBook won’t turn on, I was playing a game of LOL and the frames were really glitchy so I powered off my MacBook so I could power it back on and fix my frames also because i couldn’t leave the game. My MacBook was on charge at the time it was on 5% and it said charging but it was like a black outline not sure if that’s normal or not but after powering it off I couldn’t turn it back on. After some spamming of the power key and force shut and normal power on attempts the charged screen appeared up but after a few seconds it went back to a full black screen. I am so confused and I have a assessment due in 19 hours if anyone could help or give some advice on what to do it would be great!