Suggest Treatment For Sudden Twitches In The Body

Hi! I have had withdrawl seizures in my past but i haven t taken anything that would cause withdrawl symptoms. Yesterday I had to go to the emergency room because i was having something that appeared to be the start of a grand mal seizure. Symptoms included sudden body jerks, and drop to my knees...fully conscious still at this point. Do you by any chance happen to know from experience what could be causing this...and how i could avoid, prevent, or help to diminish by natural remedy. Also, a certain type of medication to hlelp prevent grand mal seizures as well as sudden body jerk/drop to the knees seizures? Please help me! I am desperate to find answers...as none were found yesterday when i was in the emergency room. Thank You, Courtney Hammond