I've had IBS for neally 20 years now. I've always been quite slim but throughout my 20's I suffered from excessive bloating which made me look 7 months pregnant and painful wind. In my early 30's I went on a gluten, sugar and dairy free diet and my symptoms completely disappeared. After having extensive dental work 4 years ago it came back but if I stick to a strict diet it seems to be ok for the first 2 weeks of my cycle and then my symptoms get steadily worse during the second half. I have a feeling that it must be something to do with my hormones.
I'm hoping that it will disappear now that my filling have been removed.