Any infection will heal at a different rate depending on several factors. First, your overall health and nutritional status are vital to a quick recovery. If you are malnourished or otherwise suffer from poor health, your body will have difficulty expending extra energy to try and recover fully from a new infection.
Next, your immune status is vitally important when you discuss recovering from an infection. Your body has a magnificent ability to heal itself when it is not handicapped by factors such as steroids, HIV, or other conditions that impair the immune system. Diabetes is a common cause of poor response to infections as well, for multiple reasons, which is why diabetic infections of all types are treated very carefully. Additionally, the type or types of bacteria that is present will be a factor, as some respond better to different therapies while others are notoriously slow to heal. Antibiotic choice is also important, as they all function at different rates. Smoking and other social factors can impair efficient healing.
As you can tell, you will need to speak to your specific doctor
to answer your question. However, if your symptoms get worse, or if you have not had any improvement after 48 hours, it would be a good reason to talk to your doctor again.