Maybe it's just fear or ignorance from your own subconscious feelings towards Satanic magic. Maybe your perception of Satanic beings is causing your mind to think your body is all messed up. The paralyzed feeling of your head may be you over thinking the situation. Chest throbs without a medical condition can be a sign of anxiety, such as talking to somebody you find attractive or worrying about some future event. The paralyzing effect can also be a medical condition that you have not had the proper tests for, or anxiety, or psychosomatic manifestations. I don't know, but fearing this egregore, whether it's real or not, is not helping. Find positive and constructive ways to keep your mind off of this Satanic energy.
I doubt there are any advanced mages or spiritual masters on this website, just people with experiences from various walks of life. Good luck.