How To Treat A Dent On Head And Pain In Eyebrows After An Head Injury?

Hi, I walked into a closed shop door three days ago, and banged my head quite hard on the door handle.I had a dent on my forehead, and it hurt like hell (I burst into tears!). The skin didn't break so not cut, and I didn't feel the need for medical treatment. But my eyebrow still hurts and has a slight swelling. It doesn't hurt chronically, but it does hurt if I raise my eyebrow or press it.I think it's just bruising (although nothing visible) but I'm starting to wonder whether I should be more concerned?