on brink of breakdown, need help coping?

I'm dealing with neurological issues I've never had before in my twenty years of life. I've been having them for about a year and a half now that started with lightheaded twenty four saver and has now evolved to ice cold feelings in my head, tugging feeling in my ear along with a icepick type of feeling, body wide muscle twitching, difficulty concentrating, trouble sleeping, jaw pain on the left side of head with the ear issues, loss of over 40 pounds without trying, and so much more. I feel so overwhelmed with this and have gotten so tried of my friends telling me to pray like it will save me from whatever this is...I go to a neurologist soon for a different check up after I get out of school for the semester, any good ways to cope? The scariest part of this is not knowing what is the cause to my problems.