I would honestly wait it out a few more days, and distract yourself from it and see if it goes away. It is good that you completed your antibiotics, but I'm sure the problem should have subsided before you've ran out of antibiotics (which is why doctors press you to to continue to take ALL of them, even if you no longer feel the symptoms)
There can be a lot of stress that could take into play, but if the problem gets worse or it's prolonging itself after a few more days I would definitely go back to the doctor and get it checked out. It seems to be a little high to be a sinus issue since that would run just below your eye, but I could be wrong.
Save yourself some worry and ride it out a few days, but if things escalate get in and see that doctor.