i have noticed that everty now an again when i tilt my head back i get like a not nasty pain but werid niggle thats uncomfortable, could be instant an go or could make me feel instant tired than go?can also happen when i lean forward an get up quickly, nearly always same place but can go over other side, im fairly stressed on a daily basis also the side bothers me the most i have a large cyst just below which has been there for years it has burst once before? really worried