How do I be less jumpy when playing VR?

So I like playing blade and sorcery, however, I always seem to find myself getting jumpscared or spooked by the most minor things. If someone gets to close to me when they attack I jump, and I always feel like an enemy is behind me. It's making it so VR isn't that fun for me. Does anyone have any suggestions to help me be less jumpy when playing VR?