As I said on Steam, if that doesn't clear up, get it checked out.
My dad ignored his illness, and when he FINALLY told a doctor about it, it was late-stage Mesothelioma. He was dead 8 months later. If he'd seen a doctor when I first starting suggesting he do so, they might have been able to arrest it.
Of course, it was Mesothelioma, so it's more likely that they couldn't. Still, though, it's always better to get it checked out early, especially as one gets older.
Now if you'll excuse me, I'll go back to ignoring my concussion.