I might start again tbh, wasted points. But there is an NPC who can let you re-spec up to 5 times. Just don't know how long it will take to get to her.
The only miracle I use is heal. Add one to faith as a knight and you can have it cheap. Also, add one to intelligence and you can have the magic weapon buff, which you can buy off a NPC in Firelink shrine, pretty early in the game.
Knight is a stress free class, and since you have done all the areas up till now, it won't take you long to get where you're currently at.
Warrior looks good.
Sorcery would be tricky methinks.