yeah cool! With the blood you need to change the tone so it blends more with the surroundings, as it is quite dark & there is much light around the blood would probably look more black or maroon. Might wanna blur it a bit as well, hope that helps.
I don't think it's the pooling correctly so much as it is that the blood looks cartoony as opposed to the rest of the pic. Just an observation, I don't know how you'd go about fixing that.