I had norovirus a few weeks ago, with 24 hours of severe D&V. Ever since I'm having horrid stomach pains, constipation, nausea, by the evenings I'm exhausted and feel really unwell. I'm just not bouncing back at all, the stomach pains and constipation are constant and really getting me down. Has anyone had this? Normally it's over in 24 hours but feel better shortly after too.. but this time despite the D&V stopping I'm just not feeling any better. Lying in bed now feeling shaky, sick, horrid stomach pains and backed up. 