Can anyone relate

Ok so let me explain first off I'm super excited for my lil boy to be joining our family I have a handsome son who is 4 years old he will be 5 in November I had the baby blues bad with him n I'm scared that I'll feel that way again I don't want that I have to go back to work fairly quickly after having our son and I'm worried I'll be a mess n cry all the time n I'm scared about leaving my newborn at daycare my oldest didn't start till he was 3 almost 4 at daycare I'm just so nervous and emotional already how can I deal with this