I had m/s from 7w right through to 23w. Well it wasn't m/s so much as all day sickness! I wasn't necessarily vomiting all the time....it was more like continuous nausea! In fact the vomiting didn't start until 11w and it happened maybe 1 -2 times per week and I always felt fine afterwards! I actually wish I HAD of been vomiting everyday just so that I could feel better, rather than have the continuous nausea!!