I am Bulimic and have been for nearly a year. Today I induced vomit and during this episode I felt a tight pressure around my skull and my vision went shaky and I nearly fell over. After I was done I was extremely lightheaded, shaky, and had heart palpitations. This was 30 minutes ago, currently I still have this tightness around my skull and I am very jittery, should I be concerned? Should I go to the ER? Did I have a seizure or something of the sort? Also, I had my blood taken two weeks ago, and it had no abnormalities so I am not so sure if it could be an electrolyte imbalance.