I am never late for my menstrual...always on time 28 days apart, never missed. I got married 5 months ago. Missed two menstrual cycles in July and August. Headaches, some cramping, bloated, some indigestion suddenly, some hair loss suddenly within the passed month, belly feels heavy near pelvic and abdomen area as if I m pregnant. 4 negative urine tests and a negative blood test this week. Could I be pregnant or what are other possibilities?