text: been vomiting and feeling sick to my stomach off and on for days, not sure why? i have been vomiting and feeling sick to my stomach off and on for about a week and a half now and there are no other symptoms, like there would be with the flu or something like that.  i can't be pregnant as i had my tubes tied years ago.  does anyone have any idea what it might be?  thanks. probably just a virus, but u may want to go tour doctor to make sure.