In reading your original post and some of your responses I am not sure that IBS/Bloat is your primary issue here. IBS is a pain...I too am thin and hate to be bloated but instead of becoming angry (your nik alone is somewhat scary) and lashing out at the very community that will rally around you and do their best to help you should look within yourself and see if IBS is the only problem.
You mention running two miles...your body...etc. etc. Is self-image the culprit here? It seems that IBS is not the ONLY thing getting you down.
Take time to be still and listen to your body mind and spirit...if you have God in your life pray. I have had IBS for over 20 years and Heathers diet does not work for me but it works for plenty of others. I have learned to identify trigger foods and don't eat them, I eat little yeast or refined sugar and I do very well. I am a strong believer in God and my faith has seen me through the worse times.
What I don't do is spend a lot of time belly-aching (no pun intended)and I press on to living a lifestyle where I can eat without pain. I hope that you can do the same. I am sorry that you are hurting and bloating...look to YOUR cure, you can do it!