Should i go to er for chronic sinusitis?

No...: unless there is acute changes in your symptoms and/or pain level. the ER is not really equipped to handle chronic problems, but rather, it is designed for emergency cases.

I would not: Chronic sinusitis is an inflammation by definition that has been present for at least 90 days and at that point an antibiotic is unlikely to be of any help. If you mean acute sinusitis, it is most likely that you will be placed blindly on an antibiotic. With the tremendous increase in antibiotic resistant bacteria, the indiscriminate use of an antibiotic in the absence of a culture is not good