Sounds like you need to have a serious chat with him about this specifically:

> just wish we could be mutually supportive instead of him taking his annoyance out on me. He is so short tempered and impatient, and every time he snaps at me I just want to cry.

My husband has been very caring with my foot injuries, which did not involve surgery. But even if he's perfect, I know how hard it can be. It's hard getting up and around and not being able to do things, etc. Have that talk. Relationships take constant effort or they tend to degrade. Always have to evaluate, re-evaluation, and be open to making changes, I find. PM me if you like. My husband supported me through surgery last summer, as well.