Yep, When you gotta go, you gotta go. I have been so stressed that it's not something you can hold.....there can be times when there is NO CHOICE. You just need to say.....that sometimes your body reacts to being stressed with diarrhea & you really need to go to the bathroom. I have noticed that when we are honest about what is happening to us, so many others actually relate & we realize that we aren't alone.....even with out T's. You can bet that your T has sometime in the past been is a stressful situation & her body has responded in the same way.
I remember being in college & even stressing myself out about finals, let alone dealing with presentations......I would be sure that she would definitely relate to your situation if it should ever arise.