Constipated...so badly

Melissa
I have only been able to go, ahem, #2, about once a week since I got pregnant about 12 weeks ago. Even when I do go it's not very much. It hasn't been a "problem" until last night. I had a sudden attack of violent cramps. I was on the floor screaming and crying with cramps that were almost identical to hard labor pains. My husband ran to get my an enema from the store and eventually it helped but I'm extremely sore today. So sore that it's hard to move. I sneezed and thought I was going to cry. I eat very healthy and drink 8-10 bottles of water everyday. I do all I'm "supposed" to do, but constipation has always been a problem for me. Any one else? Advice? I'm not bleeding vaginally but I do have an increase in clear/watery discharge