Welcome to HealthcareMagic forum.
Apart from pregnancy
,this could mean a hormonal
change as you are on a contraceptive
,such changes are common, also if you are expecting your cycles, this could be a PMS or pre menstrual syndrome . At times any infection with in the body can cause these kind of symptoms due to anorexia
Have plenty of water and eat well,reduce stress and get good sleep, also get an evaluation done form your physician
wish you good health