Open Question: Bleeding with bowel movements?

I need HELP!! I just had a baby one month ago tomorrow (second child) :) She was a vaginal birth. The Dr. said I had a "small" hemorrhoid and it was no big deal. However, now - my stool is covered in bright red blood and it drips from my anus. Also, the pain is horrible! It hurts to have a bowel movement and it hurt for the next day or two after one. I am also using stool softener and I am still bleeding that bad! After the birth of my first child I had an anal fissure that needed surgery. How do you know if it is a hemorrhoid or an anal fissure? I am going to call the Dr. tomorrow. I hope I dont need surgery again any thoughts?