Step 4: Read and complete the decision guide to learn more about your symptoms.
Okay, just to review: your ankle pain is not mild, there's no associated fever, it's been going on for less than three weeks without swelling and other joints are painful.
Just one more question:
Is your ankle pain worse in the morning for at least 30 minutes? Another way to ask this is: Does it take at least 30 minutes for your ankle to get as good as it's going to get for the rest of the day?