Every now and then when I'm on a good streak, I won't have a BM till late at night, 9ish, 10ish, and sometimes no matter how much I eat I just can't go! And I know with IBS-D going is the VERY last thing you want to do, but it sucks cause I can't eat anything the next day because I'm scared I'll have to go as soon as it touches my tongue. Its not constipation though, its just my stomach taking its time, time I don't have. Grrrrrrr. Does this happen to anyone else?