Hello Doctor,
I am 23 yrs old, 5'9", and 147lbs. Overall, I consider myself to be healthy, no problems. I started my period today and out of nowhere I got very lightheaded, nauseas, urge to have a bowel movement (but nothing happened), hot and cold chills, shaking hands and a feeling that I will faint. I felt very weak and drained and this continued for about an hour. I haven't had this happen to me before. What could this be?