<human>: Provide a brief overview of the text.

Hey runnit! I've been a runner for about a year and a half so far and I have a half marathon coming up in a month, as well as a 10 mile run the week before that.  I've done these runs before, so I don't have any concern about training, schedules, or any of the other popular topics, my topic is a little more personal and I hope at least one of you has encountered this.

I have irritable bowel syndrome (IBS) and those of you that have it, know how much it seriously sucks.  It's uncontrollable and an episode will hit you in the most inconvenient moments, and is also very painful.  I've had it pretty much all my life and I know how to try and prevent it, but this one just made me mad.  

I woke up about 3 hours prior to my run, ate some breakfast, drank some coffee and pretty much putzed around until I knew it was "okay" to go out.  A mile into my run, WHOMP, the IBS hit and I wanted to cry.  I instantly had to stop running and walk the mile back, running just made it so much worse...longest mile of my life ( I was in the middle of suburbia, so I couldn't just find a place to go...). 

Do any of you know any tips to help prevent this from happening? Is there a vitamin or over-the-counter thing  I can take in the morning to help?  I feel like I already do all I can and just have to deal with it when it happens, but if there is any other advice I would greatly appreciate it!
<bot>: I have IBS and an episode hit while I was running. I would really like to learn how to prevent it other than the things I already do