@contrex,
Contrex, let me say this as clearly as I can. You are being idiotic. There is no reason for the OP to panic, this is fairly routine.
1) She has already been seen by medical professionals. They looked at her tooth and decided that she needs antibiotics. She is taking the antibiotics.
2) Millions of Americans get tooth abscesses every year (without brain swelling or cutting off the airway or being attacked by rabid tree frogs). These tooth abscesses are common and the treatment is routine.
3) She is getting the same treatment that dentists give everyone. Millions of us have had this problem, we are given antibiotics and then told to come back some time in the future to fix the problem with the tooth. Often this means a root canal.
She has received medical care from professionals. That is what she was supposed to do. These professionals gave her antibiotics and told her to get an appointment with the dentist. This is what they are supposed to do. Obviously if the tooth starts to hurt more, or if there are obvious symptoms beyond the tooth, then she should seek more medical attention. But this is very unlikely to happen.
She doesn't need to worry beyond that.
If she wants more of my personal experience with getting a couple of root canals (which is perhaps the most common treatment for a tooth abscess) I would be happy to give her more of my experience.
I imagine that many of the people reading this have had root canals due to a tooth abscess. I wish they would chime in to tell the OP that there is really nothing to worry about.