What Causes Heavy Bleeding And Lower Abdominal Cramps During Menstruation?

my age is 25 weight 62 height 5ft 4inch.im unmaried n had abortion wth mt prost kit 6months before in oct last week.i did ths wthout consulting a doc.nw my periods are regular.bt during my periods,m facing heavy blood flow n cramps.n my lower abdomen keeps paining.i had done ultra sound.is evrythng ok wth me.wat shud i do nw plz tel me