My Gallimimus died ): how do you stop dying from bleeding out?

My galli died being full grown for a few days. I was drinking water and got jumped. Got hurt from the attack but ran away. But as I got away due to my speed, the blood meter was going down, and I tried to sit down which worked last time, but it kept going down and I bled out this time, Last time it worked, so I take it I took more damage this time. My first full grown Dino, gone in an instant. It happened so fast. It pounced at me and looked small, unsure what it was but I ran and that was it. Is there a way to prevent death? Or is this just how it goes?