I didn't read others' suggestions, so please forgive any repeats. Keep hydrating as much as you can, even if you end up throwing up some or most of it.

Ginger is good for settling the tummy and for the immune system. Maybe a bit of ginger infused in hot water sipped in small quantities? Also, mint is good for the tummy.

Definitely hydrate as much as you can. Do you have a hotline or something you can call to get advice? I don't mean to sound alarmist, but if it continues too long, you could end up needing IV hydration.

I hope you're already feeling better!