Cold or flu?

Whichever it is, I'm in for the long haul.

While my nose doesn't annoy me anymore, I now feel sore all over and I'm really tired as well. As icing on the cake, I also have a slight fever now. Ish.

Been looking up symptoms online and I got a few questions:

• What the hell is "mild" fatigue? How does one quantify mild fatigue?
• Can the flu turn into a cold and vice versa?

Excuse the fever babble - I think I really need to sleep now.