You poor thing. I had morning sickness for 9 months last time (I had the joys of rehydration drips too) and was thrilled when it disappeared at about 16 weeks this time. Unfortunately it came back with a vengeance at about 23 weeks. I've been told its because our hormone levels are changing again (although my OB was a bit surprised, saying its normally once you're a bit into the 3rd tri - so you would fit that I guess) He then just laughed and said I was just plain unlucky. I haven't really found anything that worked for it either - although a glass of diet coke can sometimes settle my stomach temporarily.