First of all I'm a male in my 30s.
It's not until I take a poop at my office that I feel relief. But when I'm on the train I just feel sick and I have this kind of face:
https://i.ytimg.com/vi/3v98CPXNiSk/sddefault.jpg
I try not to eat anything past 8 pm. And I would definitely prefer pooping before I leave but I don't have an urge to go. And when I get on the train I start to feel sick and have that feeling that I will poop soon.
Is this normal?