Try this.
Remove Blood From Upholstery:
Dampen a cloth with cold water and gently blot the bloodstain. Don’t scrub,. Scrubbing will push the blood further into the upholstery.
Soak a white cloth with club soda, and gently blot the stain.
Repeat step 2 as the stain lightens. You can stop blotting with the cloth when it stops pulling blood from the affected surface.
Is the stain still there? Mix 80% water, 10% glycerin, and 10% laundry detergent until well blended then pour the mixture into a spray bottle
Spray a couple of times directly onto the bloodstain, but do not oversoak. Blot with a white sponge or cloth
Blot with cold water and pat dry with a towel.
Don't use hot water. It will set the stain.