I unfortunately get UTI's a lot. This time I was prescribed macrobid and forgot at that moment in time that it has made me nausea before. It is my first day of taking it and it has already made me throw up twice. I'm also experiencing uncomfortable nausea and diarrhea. Should I keep taking it or can I go back and ask for a different antibiotic?

PS I'm a university student who is often away from my home 8-12 hours at a time and can't afford to be experience diarrhea/vomiting in the school bathroom

Please let me know your thoughts, thank you so much!