What is going on with me?

For the past week i haven't felt like myself. I have been feeling very drained and get the odd headache too. I also look really ill for some reason. I don't feel very ill, just feel drained. My eyes are puffy and my face is pale.. I workout regularly and eat relatively clean and healthy. I also get 8 hours sleep per night so i'm confused as to what is wrong with me.
What is going on with me?
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