i didn't have m/s badly (i.e. no throwing up or anything, just general nausea) but it did just disappear almost overnight. i can't remember exactly when it was - sometime around 12 weeks. i did notice that i would still get an occasional day when i felt sick but it went away for a week or two before i even got one of those.

my energy levels are still a bit up & down but definitely better than they were!