The body feels suffocation from CO2 buildup rather than a lack of oxygen, so dying from blood loss wouldn’t cause that feeling because it’s not reacting to a lack of oxygen.
My understanding (as not a medical professional) is blood loss is relatively painless on its own, it makes you sleepy until you just fall asleep and die (if not saved).
When you die from blood loss, you’d lose consciousness long before.
The feeling that makes you gasp for air is *not* due to lack of oxygen: it is due to excess CO2. So even though you’d be lacking oxygen on a whole-body scale, your CO2 levels would theoretically be normal so you wouldn’t feel like you were suffocating.
Most likely, you’d gradually drift into unconsciousness and black out as the brain gets less and less oxygen
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