Hello, For The Past Two Days, I Have Felt Achy

Hello,

For the past two days, I have felt achy in my back (Lower and upper), back of the neck, and shoulder area. My skin has also felt prickly (the sensation of clothes against my skin feels weird). I don't know if that makes sense, but I was just wondering if this was a cold or flu, or something major? I'm also feeling tired easily (it's 6:00 for me, and I want to lay in bed and do nothing. Normally I'm a very active, and healthy, person). Do you know what is going on? Thanks! -Nicole