My 11 year old son has been suffering from a minor head cold for 2-3 days. Today he played outside in snow, snowboarding down a small hill (no helmet) fell a few times but had a great time. He is now with a 101.7 fever body aches bad headache and blood shot eyes very tired. He is not a complainer, in fact typically he will go several days with strep throat and I not know he is in any discomfort. I am concerned it is strep, flu or worse could it be a concussion from snowboarding.