Our expert says:

CyberShrink

Dear C,
Sorry to hear of all the problems you've been having with PND. While generally maintaining a good diet including enough of the full range of vitamins is always good for us, no specific vitamin will relieve such a depression. You should be able to recover from this depression befopre oo long, with good advice and medication. Cilift is an effective antidepressant, which I even recommend for use in my own family, and is an appropriate choice. When one's inner chemistry has gone sufficiently out of kilter to lead to a marked depression, one doesn't get out of this entirely on one's own, an deserves the additional help of a medicine and of seeing a counsellor, which you ought also to do.
I cannt understand why ( if I'm reading you correctly ) the psychiatrist would have put you on Prozac AND Remeron, which seems a bit over the top, as it's like sweetening your coffe with sugar AND Sweetex AND honey. And if that was indeed what you were taking, it could have given you more side-effects than you needed, in proportion to the benefits.
Some people do use ECT ( Shock Therapy ) in such situations, and with benefit, though this isn't my style of practice.
Keep cooperating fully with youir psychiatrist and see a counsellor to work out the negative components in your thinking, and you can escape from this Depression and be your usual pleasant self again.