I had a surgery where I lost 2700cc of blood over a 6 hour period, I was only 9 and probably all of 3’10 at the time. During the whole surgery I never once dropped my BP or went into hypovolemic shock. For this to happen indicates a high level of incompetence by the medical staff.
if you had aspirated and choked on clotted blood as opposed to losing it via normal expected losses with organized replacements of blood and fluids...your BP would have dropped to nothing.