Hi there, I have been nauseous on and off this pregnancy, with good days and bad days, and occasionally being sick. Since Wednesday I have been feeling much better and thought I'd left it all behind, but I started being sick at 4 am last night (Sunday) and haven't been able to keep anything down since then (not even sucked ice cubes) and have been sick around every hour... Is this normal with twins? Does anyone have any advice? How long should I let this go on for before contacting the midwife?