it's like a constant little kick... you normally feel your stomach rise slightly - but it doesn't hurt. You would normally notice it when you are relaxing or lying down.

My #1 used to hiccup all the time - and he came out 4kg ~ 9lb !!
#2 didn't hiccup much - although she was a decent size 3.4kg ~ 7.8lb

I can relate to what you are going through Kirstie... In my last 8 weeks of pregnancy - I sold our house, purchased/moved into another, renovated the new house, sold my business, and also had a toddler to run after. I asked my ob if tiling/grouting a floor at 37 weeks could bring on labour - and he said no...