Hi my friend!
I'm sorry to welcome you to this community, anyway this is a strong group and will give you all the support you need. I can say to you that I suffer from IBS too (since 2004) and moreover I am allergic to some foods that I can't eat and that give my bowel the hell. As far as I know, your symptoms are not to be related neither to IBS nor to TC but, if you do a lot of physical activity, very probably they can come from there. (something inflamed in your groin or in your pelvis for example).
For sure, the other friends which will read your post here can give you more informations! Stay strong and don't let the fear take control of you!