Help please 😭

Alyssa

My 5 month old just popped her first tooth 😬 she bit me with it for the first time a couple days ago and its been rough going since then. Every time she eats she bites, and it hurts way more than i expected. I really want to bf until at least a year, but like half the people i talk to say they stopped breastfeeding because of biting. I just dont know what to do at this age to have her not bite me. I feel like she's too young to understand "no" and alot of the tips i hear to get them to stop biting. Any suggestions to help with a 5 month old?? I really need them 😩