how can i settle my stomach?

deanna • If it doesn’t feel good then why are you doing it for?
I went to town for job appointment earlier, i got a bus home and it smelt horrible (sweat and poo, there was a wet dog on the bus) and it made me feel sick so i had to get off half way home as i thought i was going to vomit (I didn't) and wait for another. Ive been feeling absolutely vile since. I can't settle my stomach at all and i need to go to my mums soon to help her with something which will involve catching 2 buses. At the moment I don't think I can manage it. How can i settle my stomach?