Hi there -
While videogames can sometimes, in certain people, cause
headaches (mostly migraines) and even
seizures, the combination of symptoms you're describing sounds more like an inner ear-related problem, and these can cause
headaches,
nausea and, eventually, generalized upper respiratory infection symptoms such as body aches, etc. I'd definitely bring this to the attention of your family doctor, as it seems to have begun in the ears (probably secondary to a sinus infection) and this kind of thing can become drawn out and make you feel pretty awful. Sometimes, if it can be determined to be a bacterial infection,
antibiotics can usually knock it out and have you feeling much better in short order.
I hope this is helpful. Please follow up with us as needed. Good luck to you.