I can really sympathise - I've just started taking ADs for PND, but no one would ever have guessed - I've spent my whole life looking like I cope. Fortunately I have a v sympathetic GP, who said, when I went in to see her, oh of course, you're one of those types who gets on with it and hide it.
Why are they not prescribing you ADs as a start, particularly if you've had them before? It's a v common scenario for people to get PND with a history of previous depression.
How helpful did you find counselling in the past? Do you think it's something you still need to do? If that's the case, then I'd take FioFio's advice and find a private counsellor - if you think you can't afford it they will often reduce their fees.
But if you don't, then go and pester them for some ADs.
I had 2.5 years of therapy a while ago, and so when the PND struck, have decided that I don't really need more, so am taking ADs (which, incidentally, are working a treat, three days in and I already feel better) and getting some CBT to sort out the anxiety which is my biggest problem.
Oh, and I'm taking vitamin B and magnesium, which someone recommended here.
But do go and pester them, you can't go on feeling so lousy, and, more importantly, you shouldn't have to. Hope this helps.