I had constipation REALLY bad...heres what i did:

I tried to find what was making me constipated...white bread and bananas. I avoided these like the black plague.

I ate all bran with the honey almond flakes and recommend it as it worked a treat for me.

Unfortunetly, at times i had no other choice but to use an enema as my constipation was so bad i would spend half n hr on the loo at work before going home to spend more time on the loo in hope. The doctor said it was ok just not all the time.

Best of luck.
Oh and the constipation goes away soon after bub is out