Hello and welcome to MedHelp forums. This sounds like it has been quite an ordeal. Here is information that helps explain what could be going on with an infected parotid land or salivary gland https://www.webmd.com/oral-health/guide/salivary-gland-problems-infections-swelling#1 . I am sure swelling on one side of the cheek is disconcerting. Please call your doctor again to address this. Different antibiotics can be used to treat different things. For example, if your bacterial infection of the salivary gland is caused by staph, a particular pathogen, an antibiotic specific to treat that would be necessary. Again, we urge you to speak to your doctor and be seen again to follow up with the continuing swelling and infection. We wish you the best and please keep us updated.