I had pretty bad m/s from weeks 4-17 where I was gagging, throwing up several times a day, the whole 9 yards. Anyway, since about week 20, I've had 5 or so episodes where I've woken up in the middle of the night and thrown up. I'm talking horrible violent vomitting that wakes DH. Everytime I try to stand up, I start throwing up all over again. It goes on for 15 minutes or so. Pretty much like my m/s was except now it's happening randomly & always in the middle of the night. Has this happened to anyone else?