Severe Constipation

This is a little embarrassing.. but ever since I had my daughter about 4 months ago, I have been dealing with severe constipation. Sometimes I'll go over a week without using the bathroom and I'll gain tons of weight from it. I've tried increasing my fiber intake and I already drink tons of water daily so that's not the problem. I have already tried benefiber and a multitude of other fiber supplements. I'll take a laxative and get almost immediate relief, but then I'll go right back to being constipated.

I have to take 2-3 colace pills daily just to have even a little relief. I don't want my body to become dependent on constantly taking colace and laxatives, but that's what it's come to. 😫 Any advice?