My fiancé had the flu shot in October. In the past 24 hours he started complaining of aches and pains. Tonight he keeps moaning in pain, breathing hard, and waking up from sleep every 15-20 minutes. He s taken ibprophen and water but he s in severe pain. His entire body is on fire but he s cold and I don t have a thermometer although his head doesn t seem that hot. Could it be the flu? Should I take him to the ER? Thanks!!