the last day of my period was on the 8th of may -- i had some light bleeding that started on the 18th. the bleeding is not constant i notice it some times when using the bathroom. i have been on birth control pills i have not been remembering to take them daily --- for the last three days ive been using a pantie liner for the bleeding. im throwing up, feeling hot and cold at different times. im woundering whats wrong with me. could i be pregnant?