TMI......
It is not normal. My daughter hadn't gone in 2 weeks and when she went to the doctor they told her to dilute a whole bottle of Miralax and take it with a bunch of water. I thought that was a lot but they said it is compared to the big bottle of stuff they give you when you have a colonoscopy. They did say though that you have to injest lots of water with it for it to work properly.
I have had this same problem! I finally upped my colace intake to 4 a day, and I always add 3 scoops of benefiber to my protein shake breakfast, I still don't go EVERYDAY but I go at least every other day. And when you go and you know it's going to be bad, get a foot stool to put your feet on while you go....it keeps things from tearing as bad and gives you a little leverage, if you know what i mean!