Sure, imodium would help you out. You can take it for acute diarrhoea, when you take say 2 tablets after the D to prevent you getting it again. Or, if you have chronic D, you can take smaller doses of Imodium regularly. You mentioned that your symptoms are worse when you're around people, but not when you're alone and relaxing. Perhaps there is some anxiety around? Anxiety can really bring on a bad bout of D. It may be that after the first time you had the D, you've been a little worried that it will happen in front of people. The worry (anxiety) then sets of your bowel. It's a self-fulfilling prophecy sadly. You can get a handle on this by using relaxation techniques, and if that doesn't work well enough, you could consider investing in some hypnotherapy recordings for anxiety or gut-specific for IBS.