This means you have missed your periods in January,if so get a pregnancy
test done even though you may not b sexually active and secondly the pain in pelvis can be because of ovarian cyst
radiating to hips and legs,or may be thrombosis
of veins because you were using pills since five years. The ovarian cyst itself can be cause of missed periods.
Would advice you to go for pregnancy test,if negative go for sonography
to rule out ovarian cyst or any other pathology. Consult your doctor with the reports,bad get examined for thrombosis of veins. Take care