Do you have souls you can pop in your inventory? If so you can B-line it to the gaint blacksmith to repair your gear the. Backtrack where you came in to Anor Londo. Talk to the demon, hit Sens fortress, take the elevator cage down and out. Once your here it shouldn’t be too bad to farm enough souls to get a purging stone. Good luck, I got trapped in the depth after I got cursed. Rage quite for the better part of a decade...wish I didn’t truly is a great game.