Another example of why phone calls are much more preferable to text messages when it comes to communicating with people you don’t know really well and vice versa. Sounds like you may have touched a nerve you didn’t know existed and that would have been a much easier fix if you had been having a telephone conversation. His response to your one text makes me think his belief that you don’t understand his schedule may have been percolating for a while and he just used this to express what was on his mind. Maybe you have made other comments in the past? Or he has had this experience with other women?
Don’t beat yourself up for word vomiting. I think many people would have a tendency to do that when they are being accused of something they weren’t actually doing. I wouldn’t be so sure you won’t hear from him again KC. He may reach out once he has had some time to reflect.