My eyes have rolled to the back of my head and fluttered before a couple of times. felt my body jerking and shaking a couple of times with my eyes rolled back. first doctor said it was nothing and didn't check for anything. what could be happening?

Not feasible to pinpoint what is occurring but a few guidelines: if you take certain medications, you might experience oculogyric crises; one might ponder pre-syncope or even seizure episodes. Obtain a second opinion, consider seeing a neurologist. You might avoid driving, use of power equipment, activity at heights, until this is diagnosed.