I would definitely go to see your primary care doctor
, or whoever prescribed the antibiotic for you, as soon as possible.
Whenever you are taking antibiotics, there always is a small chance of an allergic reaction and, for this reason, any symptoms that are new and potentially consistent with an allergic reaction need to be evaluated right away. Symptoms of a mild allergic reaction might include hives
on the face or the body. A more serious allergic reaction might include swelling around they eyes or mouth, swelling of the tongue, or trouble breathing. If the swelling around your eyes is only minimal and you have no other serious symptoms, you should get in to see your doctor; however, if you have any of the other serious symptoms, or severe eyelid swelling, then you should go directly to the emergency room and not wait for an office appointment with your doctor.
When the doctor takes a look at you, they will be able to help determine if your symptoms are consistent with an allergic reaction. If the swelling is very mild, and you don't have any other symptoms of allergy, then it might just be from puffiness induced by the sinus congestion, but it is important to rule out the more serious cause first!