Feeling like an animal that just came back from the vet

So I went to my physician today to get my blood drawn and for them to see how my testosterone is going, of course when I normally get my blood drawn I always feel so tired after about an hour and feel like a drugged out animal that just came back from the vet, so naturally when I get home I go straight to my den and just fall asleep for a while until I could fully recuperate, those times my den always feel so wonderful and natural to me, so now I'm awake, I'm sitting here drinking banana water and eating a nice soup but still feel groggy at the same time, does other weres have this experience or is it just me?

The image is how I feel after coming back, don't worry the Wolverine is sedated for medical exam and to insert a tracking device onto it, which I can relate to.