I suffered with acid reflux and indigestion a few months ago then I become quite ill sickness, headaches and constipation . I went to the doctors and they prescribed me omerprazole and told me to take one a day to help with the acid. Recently I have had what I think is a stomach virus and so have some of my work colleges. I feel terrible and now the headaches are getting worse. I ve lost a stone in 3months and feel worse after eating I ve been drinking lots of water but am now belching considerably, recently I have been getting cramp in my legs, stomach and feet my knees ache and my stools appear slimy and a peculiar shape, I m at my wits end!