I heard that GP's prescribe most antidepressants. If it's working, don't mess with it. I DO believe that if it isn't working, or if you need a combination of drugs or you are trying something "off label" (meaning that the primary intended action of the drug isn't for depression/anxiety, etc., but it's been shown to help those conditions) a good psychiatrist is worth his/her weight in gold. I've become a non-responder to most antidepressants, so I'm using another med off-label and it is incredible. Even DH remarked that he's seen a huge change in me.

Finally, don't forget talk therapy. Once your depression & anxiety abates, it may become easier to see where you get off-track. For me, my thoughts are not always my friend. Sometimes my brain wants to take me to a bad neighborhood where I worry about everything.