quick question, is it possible my plant is root bound already?

and if soo is it bad to change into a diff soil? im using peatmoss and pearlite about 2:1 ratio i kno i kno, not great of soil to use for veg but wanted to mix it up, or should i continue to use peatmoss and add wormcastings and some sort of compost. would this in any way shock the plant? Im having trouble keeping up the PH with this soil. Any suggestions would be awsome! thx guys