hello doctor I am 23 year old female, I have regular periods , but recently , during my last periods, the flow was scanty, and this time during my periods i am having painful lower abdominal cramps, terrible spasms and menstrual flow is not normal, i am hardly bleeding, only when i am pushing and stressing then only i am bleeding and its coming in thick clots. Its my second day, but no relief from pain and scanty bleeding. Normally I have pain only on my first day and my flow is moderate.II want to ask what is the reason for sudden increase in pain and scanty clotty menses? I am also undergoing antibiotics for my throat infection. please help