2 weeks after birth and my bum hurts!

I gave birth to my beautiful little boy 2 weeks ago. I have been taking colace since delivery to prevent painful bowel movements. 
The last few days it's almost agony having a bowel movement. Could this be a hemorrhoid? I can feel swelling on like one side of anus. It's itchy sometimes. I'm using with hazel pads to help with the pain but how long does this last!!?