i've tried a ton of prescription brands of prenatals, and they've all caused me to be constipated. now, i take prenatals without iron (from GNC), and then take an iron supplement called ironchel (also from GNC) which is really easy on the system and doesn't cause constipation.
also, my one proven cure for constipation is a bowl of quaker oat squares or shredded wheat (any flavor.... strawberry is my favorite), DRY, eaten with a big glass of ice water. eat it once a day. it's never failed me!
The extra Iron is a big culprit for the constipation, but it can be your system as well. During pregnancy your body actually slows down digestion to absorb everything it possibly can for you and the baby. Pretty amazing isn't it? Ask for some samples of prenatals that have a stool softner tomorrow at your appointment. That way you can try a couple of different kinds and see what works best for you without being out so much money. Congrats!!!!!
I will be 8 weeks on Thursday, and I am also having the same problem. I have gotten so bad that when I finally go it hurts so much and bleeds (sorry if tmi) I don't want to push to hard and cause myself to get hemroids. I called my Dr's office this morning and asked them what I can take. He said the best thing to take is Senokote it's a stool softner. Also right on the package it states safe for pregnant women. I am going to take it tonight and hopefully get some relife!
Definitely try the prune juice. I'm a big proponent of this. I had it on hand last month when I kept tending to constipation. Just a tumbler-full (or cup) should do about ever 4-6 hrs if needed that much. Prune juice is indeed fiber, but unlike those other methods, it is so fine you can't even tell there is any pulp in the juice. So it sort of counteracts the drawbacks of "fiber" - if your system - stomach, intestines - is stagnating (which yours is because it's pregnant), fiber isn't good for you. But prune juice is so fine and perfectly liquid, it doesn't much matter it seems.