M.S.
Hi S.,
It looks like you've received some good advice. You might want to try asking your obstetrician for a refferal as well.
Also, keep in mind that this is so common. I went through it three times - never needing meds, but definite ups & downs, not feeling at all myself, etc. Lack of sleep, which goes along with having a baby, is also a big contributer to how we feel. So when, and if at all possible, try and get as much sleep as you can.
This will a resolve before you know it! Keep your chin up!