If the amount of salt in your blood (serum sodium) rises too high, too fast it can actually cause brain damage. Depending on the hospital/lab a normal range is 135-145 mmol/L. A woman drank a bottle of soy sauce and it brought hers up to 187 mmol/L (highest documented serum sodium). She ultimately died.

https://pubmed.ncbi.nlm.nih.gov/21315305/#:~:text=Abstract,shoyu (Japanese soy sauce).

“Osmotic demyelination syndrome (ODS) leads to brain cell dysfunction. It is caused by the destruction of the layer (myelin sheath) covering nerve cells in the middle of the brainstem (pons).”

https://medlineplus.gov/ency/article/000775.htm#:~:text=Osmotic demyelination syndrome (ODS) leads,of the brainstem (pons).t

If you choose to go to the hospital to be seen make sure and tell your nurse and doctor about your reactions to previous antibiotics. There are plenty of others they can prescribe.

If you have to stay overnight communicate your feelings about that to those taking care of you. They can’t help you if you don’t let them know how you are feeling.

If there is something reasonable they be an do to help accommodate you they will. Need less interactions? They can put a do not disturb sign on your door and just check in on your minimally. Ask all the questions you have about anything that makes you anxious.