Morning sickness !😫

Cee
Hey guys, I'm Courtney. I'm 18 years and my fiancé is 21. We've been together since I was 14. And he proposed to me when I was 17. 
I'm 5weeks pregnant and found this week that were expecting twins!😱
But I feel extremely neausous! I'll be sick around 8 times on a good day. Sometimes even waking up in the night to be sick. 😞 Throughout the day I feel constantly neausous. 
These are my first children and I was wondering if anyone has any remedies to stop feeling so sick and when did everyone's  morning sickness stop?