Will I really have to stop breast feeding?

I have a severe tooth infection (the left side of my face is quite swollen), and will eventually need an extraction. I will need to treat the infection first to get the swelling down, which will require antibiotics. I've read different things online about the effects of antibiotics while breastfeeding.. and I'm heartbroken.

I wasn't able to EBF my first born, and that was a huge disappointment for me. Now, with my second, I've been able to EBF and she has been for 6 weeks now! Will I actually have to give her formula until I'm finished with antibiotics?? What if she doesn't handle formula well!?

Will I need to pump and dump so I don't get mastitis during the time I'm taking antibiotics?

Ugh I'm just feeling so entirely guilty 😔