Pointing out the obvious here but I agree with TheLostBoys. Benzodiazepines can be a very useful tool for tackling short-term anxiety but are certainly no joke when it comes to tolerance, dependence and addiction.
Benzodiazepines
should only be prescribed as an acute intervention that should be taken for a
maximum of
4-6 weeks.
I don't mean to be condescending but have you thought what you are going to do after the 4-6 weeks? Suffer from rebound-anxiety effects and crave them more? Or carry on taking them and become dependant on them? In 95% of cases, Benzodiazepines are not the answer for treating anxiety.
I also agree with Ignot, that some medications can exacerbate symptoms of both depression and anxiety, either temporarily or permanently (only - to the extent of the period in which you take them). Citalopram/Celexia turned me from a slightly anxious young-man into a complete nervous-fucking-wreck too anxious to piss for fear of my dick falling off.
And no you don't need to, and shouldn't need to, 'trick' your doctor into prescribing you anything. You should always be upfront and honest. There's a clear difference between doing thorough research on medications and being well prepared to discuss all of your available options with your doctor, and drug-shopping with your doctor. For those who are telling you that you're choosing to be miserable, it's honestly not worth entertaining their remarks. I used to, and it wound me up even more. I quickly learned that they were just ignorant to mental health problems, and it probably wasn't their fault for being so ignorant. For those who've never experienced a clinical mental-health problem, it can often be hard to get your head around it.
Depression? Cheer up.
Anxiety? Quit worrying.
OCD? Get over it.
Schizophrenia? Attention seeker.
Anorexia? Grow up.
The sooner you realise that they are just ignorant to the facts of these conditions, the sooner you'll be able to let it go. I know it's easier said than done, but just try to ignore them. If they're unfortunate enough to ever suffer from any of those conditions, they'll soon learn how ignorant they were.
However...
If you can tolerate them, you have quite a few more viable options than Benzodiazepines. Also please note that just because one drug in one class of medications didn't go down too well, doesn't mean you'll respond in the same manner to all of them. It's likely you'll also have to endure a rough 4-6 weeks of ill side-effects before you may see any improvement with a lot of them - as you'll probably know from having taken Duloxetine, Escitalopram and Mirtazapine. There's no magic cure to anxiety, if you had one - you'd be a billionaire, and it's largely a game of trial and error.
Here's a list of the most common types of medications used to treat Chronic Anxiety/Generalised Anxiety Disorder, and particular medications within such groups, which you may be familiar with since you've tried a few for your depression. Please note I'm from London so I'm referring to the generic English pharmaceutical names, which may differ to that of which are used in America, Canada & other parts of Europe.
TCA's Common ones:
Amitriptyline/
Nortriptyline/
Dosulepin/
Clomipramine/
Imipramine
TeCA's Common ones:
Mirtazapine
SSRI's Common ones:
Citalopram/
Fluvoxamine/
Escitalopram/
Paroxetine/
Sertraline/
Fluoxetine
SNRI's Common ones:
Venlafaxine/
Duloxetine
5-HT1A Receptor Partial Agonists Common ones:
Buspirone/
Tandospirone
Others/Misc:
Pregabalin/
Gabapentin/
Agomelatine/
Propranolol/
Clonidine
I too suffer from both Major Depressive Disorder & Generalised Anxiety Disorder and have taken most of the above in order to treat my symptoms with varying results of success. For what it counts, I found my symptoms of anxiety much, much easier to control than that of depression. Pregabalin, Agomelatine and Dosulepin were notably successful in helping to treat my anxiety, however, I really struggled to control the depression - and still do. This is usually the case with patients who are suffering from both conditions.
If there's anything else I can answer/help with - just hit me up.