I don't want get too involved in this discussion, but in the medical sense, one does not simply "go into shock from the pain". For shock, there needs to be some mechanism that is interrupting the circulatory system and preventing proper blood flow to the tissues of the body[0]. Sure, that mechanism could be something that also causes one to go unconscious. It may be also be an "Acute Stress reaction" [1], and it does not seem to involve a grave threat to the circulatory system. It's psychological. Note: I am not a doctor, and anything I've said here should not be misconstrued as medical advice/diagnosis. I've simply taken a first-aid course.

[0]https://en.wikipedia.org/wiki/Shock_(circulatory)

[1]https://en.wikipedia.org/wiki/Acute_stress_reaction