Just because you are psi, doesn’t necessarily mean your body can get the energy it needs from blood.
There’s no harm in trying as long as you are safe. On that note, do check out sphynxcatVP’s site. There is a large resource of articles there on blood play, the tools to use, how to be safe. As well as other guides on blood substitutes to try and other tips for maintaining general health, all of which can help.