A little over 10 would seem ok to me on the face of it unless they were all coming from long distance but you said the xG was still good so they must have been decent chances.
Suppose you're looking to completely dominate, but how do you compare to other teams on the shot stats? I'm only in Scotland but would think everything is still relative. The top Scottish teams trying to dominate as much as the top English teams within their own divisions.If 10+ is a bad day it sounds alright to me. Maybe the English league is different, think I've only ever seen 30 in a friendly.
Anyway, I'd say not to worry, sounds like you might be doing fine.