To be honest I couldn't care less, he's my pdoc not my lover. If he makes a mistake, he can tell the truth of it or not, so long as I get my slot I don't really care.
I also don't care if he cancels, if he had something else to do it's none of my fkin business so long as it's not costing me.
I often bail on appointments without telling him, it's not personal to my pdoc, I Just had something else to do.

If it effected his treatment of me somehow then maybe I would be hacked off, but I can't see why it would.