Postpartum sadness

I had my son 5 days ago and he is so perfect and my husband is taking this first week off and he has been absolutely amazing. But I can't shake this depression that's hanging over me. I hate being in the house and I feel alone even though i know I'm not. My husband starts back at work next week and I'm so nervous.. I've never had depression before.. I just want to enjoy this and get rid of the negative thoughts. Anyone else feel this way or have advise?