Could be or may just be normal but either way, there is no loss on going to therapy as a precursor to even just vent away and ease off the pressures. There isn't a judgement and personally, I really think there should be support like therapy for everyone post pregnancy seen as most of us (of not all) haven't any village now like the way we used to
Are you sleeping? I ask because if I have nights with no sleep I’m so down and negative etc the next day I’m literally a different me. It’s awful. But when I sleep ok / well I’m so positive and loving being a mum. On the sleep deprived days I tick all boxes for PPD but then the next day I’m fine. My HV said to reach out if it’s 3 more day consecutive days of just dull. But worth you speaking to them anyway, no harm x
Sorry to hear you're not feeling great. I don't know a lot about pp depression, but I'm a mental health first aider. I feel if you're questioning it at all it's better to get some help. You know yourself and if you don't feel right, get checked. There's nothing to be lost. You should also try to talk to family and friends, both for support network and to see if they notice any difference. Being as open as possible with your people is always good. Try to get outside and see if anyone can give you even an hour to yourself for some you time. I hope you're feeling better soon x