After getting a new really really comfortable shoulder rest yesterday i then found something else causing me discomfort is my chinrest

My teacher said a few weeks ago that i may have to get a new chinrest but hasn't mentioned it since, but it's quite small and it digs into my jaw/chin - i'm very bony and stuff

Anyway for the time being (not gonna buy a chinrest without asking my teacher which kind first) i just found a cloth and put it over the chinrest and it's soo comfortable and makes my violin seem more secure too. I played for 3 hours without any discomfort
Should i still get a new chinrest or just use the cloth over the one i already have? Or is that stupid?

Does anyone else do anything like that? I've seen some people use one, but not very often