Mine is occasional now at 18 twrds 19wks due to acid reflux, I find all ways to reduce my morning sickness during week 9 to 14, eating small and avoid spicy, greasy food.. All bland food, yes and totally boring, sleeping position at 45° or to 90° to avoid the reflux from the progesterones, then i started vomitting acid like stuffs for heartburn,so i started pregnancy yoga poses and breathing, walking 30mins a day and doing housework helped a lot in reducing all these nausea and vomitting. Maybe find the trigger cause for ur vomitting. Hopefully urs wil go away soon Mommy!