Is it at all possible for fluoxetine (generic form of prozac), to work somewhat immediately?

i started taking it 3 days ago. With my incredible work load, studying, and everything else.. I almost seem able to deal better, my lowliness is fading, but I'm thinking it's more of a placebo effect. I heard it takes around 6 weeks to start working. Just curious.
Update: thank you for your answer..
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