Yes you can refer yourself online to health in mind. They have a wonderful perinatal mental health team that specialise in post natal depression x
Call your midwife maybe, they should be able to pinpoint at least depending on how long post partum you are. Sorry to hear but it’s so very common x
i’ve used health in mind for postpartum before, they’re very good i always go back to them when i feel my mental health slipping xx
You can refer yourself to health in mind or go through your HV x