Help with healing

I have been having a hard time getting the game master to heal my characters even if I explicitly say something about healing. The game master just won’t add HP even if I say, use a potion rest, use healing spells or go to an actual doctor. My characters keep getting killed because they don’t get their HP back. It’s really grinding my gears because in the text generated by the game master even talks about how my character is being healed by the thing.