oh dear, wishing you a swift recovery then!!! :(
Ive had hand issues too but thankfully I wasn’t in a situation where I couldn’t just stop/slow the activity causing it so it never grew into anything serious, I got concerned when it started hurting consistently and dropped the game that was making it way worse + got my girlfriend to help when it hurt too much on the stuff I didn’t stop hahaha ^^;;
hopefully treatment will help you if rest wasn’t enough, treat yourself kindly too