I don't know if it can go away on it's own. It's pretty risky not to get help for it however. I had severe PPD for 7 months after my DD was born. I didnt treat it until I was 3.5 weeks post partum. In those 3 weeks a lot of damage was done. Nursing was lost, and my bond with dd was delayed, as I was just unable to cope. I got Zoloft (not a perfect drug, but it really really helped me) and took that until dd was about 7 months old. Then I switched to Rescue Remedy and the occasional Lorazepam (mine was a very anxious PPD) and by about 8.5 months I no longer needed Lorazepam.
I havent taken RR in a while, couple months at least. I stopped wanting it after I quit bc pills. Those things did not help my hormones stay stable, to say the least.
If I hadnt gotten help, Id ont know what would have happened. It cant hurt to be seen by a psychologist/psychiatrist if you are depressed. Also, a consultation with a homeopath could be very beneficial.
Good luck! Email me if you ever need to talk.
I've had every crazy thought including chucking my baby out the sunroof of our moving car & suicidal ideations during my PPd so I promise I wouldnt judge. Take care of yourself!