J.P.
Yes. And make sure you take care of it. A few years ago I got some severe pain behind my eye and let it go on too long. When I finally went to the doc he said it's not something to mess with cause too much pressure can damage the optic nerve. So take care of it. Oh, and FYI, ever since then, whenever I start getting congestion again, the pain start to come back and in fact last week I had another flare-up. I'm on the antibiotics trying to get rid of the sinus infection behind my eye again.
Go to the doc and good luck. Hopefully you're taking care of it soon enough that you won't have more problems.