Excuse me if I missed some of the background info here.
Did this Mom have Thyroid levels done?
When my Son was about 6 months old I crashed into a very painful and life
changing PPD. I went from Dr to Dr searching for a diagnosis for my
palpitations, extreme panic attacks etc and one did come up with
"Thyroiditis" with no testing (can you test for this or only based on
symptoms?).
And yes, PPD can be diagnosed as long as 2 yrsafter.

One Psychiatrist insisted I was not depressed, and should begin Betablockers
for my palps. I suffered for a long time and hope this Mom is getting the
right diagnosis.
Respectfully,
Janet Black RN
Breastfeeding Counsellor
Mission BF Support Services