S.G.
No one told me about this when I had my daughter and I could have cried every time I had to go to the bathroom after I had her!! I ended up buying stool softners that are veggie based which helped greatly!!
I was way more prepared with my son and I bought a bottle of Metamusil tablets but you have to take like 6 at a time which was a pain and they didn't seem to help much so I went back to the stool softner. I can't think of any brands off the top of my head but I know walmart makes a cheaper version of a name brand one.
Good luck!
S.