Hello and hope you are doing well.
Pain in the eyes can occur with conjunctivitis. It can be caused by infections and noninfectious conditions. Infections can be due to viral, bacterial and chlamydial. Non infectious causes are allergies, chemicals and injury. Pain is also a symptom of other inflammations or infections of other parts of the eye like iris, cornea, lens etc. It can also be seen in stye, glaucoma and optic neuritis. But if the pain increases or if there is associated defective vision, then you may need to consult an ophthalmologist to rule out the causes for pain and defective vision.
Hope this helped and do keep us posted.
It's consistent with a sinus infection, but it could be something else. Only a doctor could diagnose it.