Hello. I have had a heavy cold/Flu for 5 days ( runny nose, sneeze, fever etc ) but it was preceded by 3 days of weakness in both my arms, both forearm and upper arm which among other things make this tricky to type ( these were the only 'flu' symptoms for first 72 hours ) and this discomfort is still with me ( nearly 9 days now with this 'pain' ) The fever is wearing off but my arms and shoulders can still be tired and uncomfortable. Is this normal ? ( Thanks )