I have this feeling often and it is certainly uncomfortable! My dr. (as well as some people on this BB) have said that it feels that way, even after we've gone because the colon is having a spasm. Doesn't really help you feel better to know that though. I don't know how often enemas should be used without fear of harm. Have you asked your doctor? I am using Mike Mahoney's IBS hypnotherapy tapes-I believe that partly they are helping me to not feel as anxious about that lousy incomplete evacuation feeling. It seems like I'm not obsessing about is as much when it happens. Maybe you could give them a try?