Overwhelmed - Anyone else?

My baby boy is 5 days old now. The minute we pulled into our driveway from the hospital 3 days ago, I started feeling the effects of the baby blues. Yesterday I started feeling a little better (to the point that I'm able to control the tears) but I'm still so overwhelmed. You think 9 months would have prepared me for this but I just can't seem to emotionally handle all of this change. I have extreme anxiety just thinking about when my husband has to go back to work. 
Is/has anyone else experienced this? How did you cope? How long until this new life felt "normal"?