Is there something wrong with my body?

Hi ladies! I have a question I hope some can give me some advice on. I am 18 years old and currently 8 months postpartum. Before I had my son, my body was healthy. Having bowel movements every day, but ever since I had him, it's rare. I have maybe 3 a week. I go days without pooping. I end up having to take a laxitive or my body just wont go. I eat high fiber foods, and even take daily fiber supplements. (Metamucil). And that worked to keep me regular for a few weeks, but it stopped. Now even with all the water and fiber, I dont poop. Should I go see my doctor about this, or any advice on how I should deal with this to make it better? Thanks for reading!!