Can anyone offer help with new mom constipation?

[MarigoldSully]

I have had constipation off and on since the birth of my son in March.  I really would love to put a stop to this now and for all.  I am regular but when I become constipated my stools are hard, large, and difficult to pass.  I'm unsure if this is hormonal, diet, procrastination or a combination of these.  Stool softeners don't work on me.  I know that constipation can come in many forms but I wanted to know specifically what I can do to combat my type.  I am a 31 year old female mother of 2.  Thanks in advance!