Hi Bean & Regg,
Contractions pain is like menstrual cramps and also some said it is like the cramps you get with diarrhea or constipation.
Each time when u have the pain, please time the interval, ie. from the time u felt the pain until the next pain. If is false labor contraction, it will go away when you change position.
If is the real one, the interval will get closer and closer, if the internal is between 15 to 20 mins, you have to go to hospital liao.