Any other EBF moms exhausted?

Jessica
I can't seem to get enough sleep. My baby (4 months old) sleeps 10 consecutive hours at night and I'm getting around 9. I'm also having to nap because I'm so tired. This doesn't seem normal. Is my baby just taking all my vitamins and leaving me tired?  Has this happened to anyone else?
I don't feel depressed, I'm overall pretty happy so I don't think that's the problem. Just feeling very drained.