Oh and go to your local hospital and ask them to draw your serotonin level. Tell them you don't need a Dr.'s order for it, you know what you're looking for.
Oh wait, yeah, you CAN get it some places - here's one:
http://www.walkinlab.com/catalogsearch/result/?order=relevance&dir=desc&q=serotonin&btnSearchSubmit=
Go ahead and spend that $125 (it's VALUE is $253! You Save $128!). Come back and let us know what that tells you about your depression and/or anxiety.
<edit> I'm just saying, if you're going to give medical advice, be prepared to be called on it if it's wrong. You can put in a disclaimer all you want, it doesn't change the fact that you're working on and passing along incorrect information.
Have you taken anti-depressants? Have you had panic attacks/anxiety that disrupted you life? Do you have experience as a patient yourself?...one thing that I've been told by several doctors is that patients often know more about their specific condition(s) than their doctors if they have had the condition long enough; especially if we are talking about a general practitioner who must be a jack of all trades. I also mentioned that you have to pay out of pocket so the price is no surprise to anyone and you basically validated what I already said but tried to find a way to still mock it. I also realize that everyone is different and that the lab ranges are meant to try and fit 90% of the populace but someone with low serotonin might feel fine and someone with high serotonin might not; or may not have symptoms of serotonin syndrome. I know this doctor, I get your point. But wouldn't you agree that patients SHOULD take responsibility for their own health and ask questions and be engaged in their health and not just do whatever they are told without questions or second opinions, etc? Wouldn't you agree that if you were treating someone that it would be somewhat useful to know their serotonin level rather than not if they seemed depressed...I mean if they carried in a lab would you even look at it?
My opinions are not an incitement on you personally or your profession...but there is another side of the story and smart people can learn/read the same as you despite not having the formal education and day-to-day experience. Your opinion is ALWAYS valuable...if I saw you I'd want you to tell me where I was going wrong; in most cases you'd be right with a patient who googled something right before they came in. But for those people that have experienced certain conditions long-term, you can also learn from them too...I once told a PA I knew (not treating me just knew her) to look into using Clomid for a patient of hers who was 19 and had low-T...she later came back to me and said "hey thanks for telling me about that, it really helped that guy"...I read about it; I have books about it written by doctors man...but I don't know it all and I respect your education & opinion as I previously made known.
I just hope the OP actually has a doctor that is as interested as you in his situation so he can get some relief and be monitored properly too.