Hi tasja, sorry you are feeling this way. Symptoms of PND are:
feelings of worthlessness or guilt
poor concentration
loss of energy and fatigue
loss or increase of appetite and weight
disturbed sleep pattern
slowing down both physically & mentally
agitation (restlessness or anxiety)
thoughts of suicide or preoccupation with death
These are also classic depression symptoms. If you tick any of these boxes, especially the latter then you might want to have a word with your gp or hv. Don't feel ashamed, it is very common and you'll feel so much better if you get help, if you need it.
Loneliness is a big contributing factor imo. There's all sorts of m&t things you can join but also just chatting on here can really help. You're not alone .