Do you think maybe that you might be jumping to conclusions about losing him? Is your whole relationship based on sex? Sometimes communication is very helpful. Does he know about what happened to you? Perhaps he would be patient, understanding and compassionate if you asked him to.
These are just my thoughts on the matter. I don't know your husband or situation.
As you get better at grounding yourself, your sex life might improve. I hope so anyway.
Good luck to you and take care, Morgan