OMG I tried everything in the first 12 weeks, I had morning sickness so bad that I had no liquid in my body to make me go - it was literally 17 days between going at one point!!!

If you get bad and you want to 'clear out' then get Microlax from the chemist. It is basically an at home enema but it makes you go within about 10 mind of using it. Perfectly safe to use while pregnant. I used it 2 or 3 times and then my body kicked back into place and started going on its own again.