it's nice to know that someone else has the same problem! (well its not actually nice but you know what i mean). I came off the pill four months ago - 1st month normal, 2nd month 2weeks late and last month it didn't arrive at all and preg tests say neg. I went to the dr's last month when 2 weeks late and he told me that after being on the pill for so long (6years) that it may take my body a while to sort its self out but to keep eating healthy/exercise etc. like one is suppose to if one gets pregnant - he was'nt too worried.Have only recently been diagnosed with IBS (after giving up pill) but it had been suspected for about a year. Good luck and keep it touch if you do find out what may help!