Yup, sounds like gallstones to me! Just like what my attacks were. I ended up in the 24hr Dr the first time as I didn't know what was going on, was 3 weeks post partum and the pain was worse than labour!

I hope you've seen your GP, as it would be bad if you had another attack if DD was awake and needing you. In the mean time, following a very very low fat diet is meant to help prevent further attacks...

HTH