Anxiety

I don't know about in the UK but in the States you can ask your GP or your OBGYN for an antidepressant or anti-anxiety medication to get you through a rough patch. Here they'll eventually hand off to a psychiatrist (mostly, sometimes GPs will manage basic antidepressant meds) but they take PPD/PPA pretty seriously and will medicate you quickly to try and prevent it getting worse.

All this is to say that I would thing your GP would help you until you get to a psychiatrist. I don't know how the NHS works but I'd say reaching out to GP asap would be the way to go.

I'm sorry you're dealing with this. I am a year plus postpartum and have a history of anxiety and panic attacks, even still my level of anxiety has been waaaay worse than I expected. Try to read up on some ways to reality check your anxieties and break some of the rituals you feel you need to do (if you have them). Of course, all this is while you're waiting on your GP. Don't wait to reach out. *hugs*