mine was not diagnosed for 18 months......
have you tried the birth trauma association or sheila kitzinger's birth crisis...if you google them you will find them,.. i can link later when on MAC.....both can help you deal with the trauma of your first birth..you really should debrief yourself and put that birth 'to bed' , as it were ,before you move on to the next one...IMHO
my PND was triggered by my first birth....failed induction, led to em, c.s.......felt so cheated and like i had failed as i had not 'given birth', but DS has been surgically removed from me.....
the only thing i did, was to wait until i was better until we started to try for DD..as didnlt want to be depressed and pregnant and cope with a new born and DS>.
but i did very much feel like a positive birth would heal me .,...and as you know, i had a VBAC and that is what inspired me to train as doula,.....beccause a positive birth made such a difference to me...not a hint of PND this time,,,,,