help? sad? postpartum depression?

I don't know why but I cry so much. i just had my baby a week ago and I feel so sad for no reason. I love my baby soo much but I literally cry all the time. My husband sometimes catches me teary eyed. He ask me what's wrong and I just don't know how to answer. I heard about postpartum depression and I'm not sure if this is what I'm going through right now. btw I'm a ftm. ugh. will this go away? I feel so helpless n sad.