Last Sunday, I nearly had a BM in front of the cashier at the Canadian Tire store. When I first got there while shopping, I felt a storm brewing below but I figured it could be suppressed, even if it were a bit uncomfortable. But by the time I got to the cashier line, it was getting downright urgent.
Try as I might to suppress it, it just kept on "pushing". When the free cashier signalled to me that she was available, I took baby steps towards her station without making it too obvious. If had I took my normal stride, it would have all come out. I was so close to giving in, it was so bad. But I took small steps across the parking lot to the car and sitting down quieted the urge down to a subdued level, and I was able to make it home.
All of this reminded me that I am not prepared for this! I've had some diarrhea incidents and a partial BM on another occasion. I have to face the fact that F-IC is headed my way so it seems.

So now I have questions:
Q1. Is a pull-up sufficient for containment? I suspect not, or at least not without plastic pants. Embarrassment is job #1, but avoiding soling my jeans is the 2nd main priority. I normally wear pull-ups during the day since I use the toilet when I can.
Q2. Would you trust something like the TENA Flex (shown below) with a BM (it is open at the sides for breathing)? I sometimes wear these when I want to allow myself to air out some, and on other days I'll wear an underwear brief over it as a compresser.
Q3. How do you deal with the gag reflex? My father had that bad but I know it will affect me too.
Q4. I need to find out more about Nullo or its equivalents. I assume this is an over-the-counter drug of some sort.
Q5. If you were in my place, not yet F-IC and managing urinary IC, how what would you wear just in case? I don't want to be over protected but at the same time I want to save face if the worst should happen. The main challenge for me is that I still make use of the toilet at home/office.
Nothing about this is easy.