I also spot when I do a longer run... I went and got checked out and the Dr didn't seem concerned at all. Apparently some women spot when working out hard. Had my hormones checked, ultrasound, etc... nothing was abnormal. I don't spot all the time, and haven't for a little while now... but I'm slowly upping my workouts. Maybe it was an overexertion thing?? I'm not sure. Although i did get checked out, I may go back if the spotting starts again... just to be sure.

And I can relate to the IBS too... it never seems to fail that every run leads to be having to go pretty bad either during or right after a run. I can try to go before, not have to go, then BOOM! I'm trying to run faster home to hit the bathroom! I have heard of trying to time runs better with your normal "cycle" but sometimes that just doesn't line up.

Did you head to the Dr? Any news there?