I had M/S for weeks 6-9. I had an Ob appointment at week 8 and was saying that I had not had M/S that week, then promply during my lunch, I had to visit the bathroom for a chuck, felt ok duing week 9, but then again during lunch I had a surprise vomit. So during weeks 8 and 9 I didn't feel nausea, but had the 2 vomits. I have been fine since.