You have an uncomfortable pain abdoman and that is sufficient reason to see a doctor.
Anyway let me explain your problem- after a Dilation and Curretage treatment there is inflammation in the genital passage and uterus
and may be a cause for slight urinary frequency, excessive bleed on following two months menses with slight pain.
But in your case Dilation and Curretage was done in Feb. so pretty long time, persistent symptoms denote another complication of this procedure the Retained products of conception- that is some bits of membranes may remain in uterus and can cause excessive bleeding, crampy pain, and infection -even septic shock
So please get yourself evaluated.