I had the same thing last week! I got the gastro bug that's going around and with it I was getting REALLY bad stomach cramps every few minutes. I went to the hospital, as I thought the same as you - I thought the baby was coming! The doc did an internal and said I wasn't dilated at all - phew! But I was so dehydrated that the bubs heart rate was elevated so I had to stay the night there on a drip.
They ended up deciding that the cramps were uterine irritations brought on by the gastro bug. They were measuring them on the 'contraction monitor' thing, and some of the cramps were as big as the contractions I had when I was in labour with DD.
I can't believe I'm going to have to go through all that pain again in a few weeks time when bub really does come!
OMG, thanks goodness. it sounds like you had the exact sme thing as i did. It was so painful.
The midwife was trying to feel my abdomen for the contactions, but couldnt feel anything.
Must be a bad bug going round. I still have the runs and bad tummy cramps, and its 3 days later