Sinus headaches are fairly common, and many people have experienced them. They involve pressure in the forehead, cheeks, and eyes - the sinus areas.
That being said, it's important to never leap to a conclusion with a headache. It could be that the headache you had two weeks ago near the eyes was a sinus headache - but this one you're having today near the eyes is caused by something else. Always listen to your body and investigate what is going on before taking action.
For example, while a sinus headache and a migraine can feel similar, with a migraine you often have "full body involvement" - nausea, cold fingers and toes, sensitivity to bright light. You wouldn't have those issues with a simple sinus headache. So a good test when you feel you have a sinus headache is to first rule out a migraine, by looking at the symptoms for a migraine and ensuring you don't have the specific ones only found with migraines.
Your sinus cavities are sensitive to the things you breathe in. So a first step in preventing sinus headaches is to stop smoking and to avoid places that are smoky.
Also, check the humidity level of the places you frequent. Many stores sell inexpensive humidity monitors that you can carry with you and check the humidity of the place you are. You want the room to be moist, so that the dryness doesn't harm your delicate sinus cavities. However, you also don't want the room to be TOO moist, so that mold grows with abandon. Ideally you want to aim for a humidity somewhere in the 40%-50% range. You can raise humidity with a humidifier and decrease it with a dehumidifier.
If your sinuses become infected, it's wise to talk with a doctor about getting that under control. If you routinely get this situation happening, talk with them about what might be causing the problem. It could be that your home has a mold problem that you don't know about, or that there's another environmental issue at work.
The more you can make your environment a safe and healthy one, the more your body will run smoothly.