A vertical yellow line on the left side of my screen but never dropped

I have a yellow vertical line on the left side of tablet screen it appears and disappears i never dropped it (samsung tab A 10.1) and i just got it (its been exactly 7 days) and if i don't fix it will it get worse, if it can get worse, how? per example will the screen turn black or maybe the touchscreen won't work? Because that line appears and disappears please help!

I tried turning the blue light filter and sometimes it disappears to about 30 seconds to a whole minute when i was asking the question ⬆️ the line was there but right now its not which is why I'm confused is there no other way to try to fix it without paying?