It's not your fault at all- no need to even apologize. In fact, I would see if there is a system at your hospital where you can report this doctor for his inappropriate behavior and threats towards you. You should NEVER have to apologize for being an advocate for your patient! Unfortunately things like this continue to happen and you will quickly learn which doctors are notorious for this behavior. Despite them being rude, don't ever let that get in the way of you calling them in the middle of the night for something that your patient needs. Patient care comes first