You may have a tear duct that is blocked. Keep taking the sinus medication and put warm wash cloths on your face over the eye and nose.
Also, Run your finger along your nose from the corner of your eye down to side of your nose. This is called "milking" the duct and will hopefully help to drain so your eyes won't tear up.
If these things do not work than you will need to see a provider to see if you have an infection.