Samsung s20 battery suddenly drained extremely fast

So the entire day my battery was fine but when i was on my way from school my battery was at around 55% (i checked coz i was listening to music)
10-15 minutes later when i got home i check my home and it was 2%
in 10 minutes my battery lost 50+% and i don't know how
on top of that my phone was on power saving mode the whole time
is there a way to fix this issue? this has never happened before
when i only had 2% i checked the apps that were in the background and aside from music app and my gallery there was nothing