My bestest friend went through the samething gained weight and had m/s up until 14 weeks with the first 2 ds but with her third ds was sick with m/s until the day he was born...must say that although she had a terrible time with the pg her 3rd ds is an angel...so lets hope you experience the samething...i always say if you are really worried have a chat with your gp/ob/midwife...hope your feeling better soon