So it ends up I didn't take the Healing domain after all. I could have sworn I did. :\ Guess that's what I get for not actually looking at my character record before posting.
So, should I change the Protection domain to Healing, (because I already used my Earth domain spell) and live with it, or just take two points of healing back from Gregor?
If you decide to do the latter, go ahead and use my orisons to boost him back to full hp.
I would vote for healing because it is a really cool domain and fits your character story of being a Moradin healer cleric.