A shift in symptoms, now I'm feel extremely foggy headed and can't focus

My concern has turned to my brain (my heart was recently checked and cleared).  I've been having difficulty focusing, and I've noticed a decline in my writing ability over the past month, or so.  This decline could be attributed to my increased anxiety state, but rational explanations don't provide me with much solace.  

I have this persistent foggy state.  I feel like I'm sort of dizzy, but not, and very nervous.  I had extensive bloodwork done, but it's been a while since I've had a brain scan.  One feature of my anxiety is that it tends to shift and manifest in different ways.  Once one fear is addressed, another seems to arise, and I'm wondering if that's not what's occuring here.

I'm wondering if I can hear what others have done to alleviate these symptoms (foggy headed/weird-head sensation, excitability, lack of focus).  I find myself so preoccupied with these symptoms.  I find that I'm generally fine upon waking up in the morning, but once I have a chance to catch my bearings, I start to go into that state.  

My anxiety was present, but largely managed until about a few months ago now, there was a situation I took my meds for the day without eating (metoprolol and xanax), and then went for a run.  After my run I noticed I felt very light headed and dizzy.  I shouldn't have exercized after taking my meds and not eating (metoprolol er is to be taken with food).  I quickly recovered, but this incident triggered non-stop anxiety in me since and I haven't been able to shake the sensations.  I've been in the emergency room once, and had another visit with my GP.  I want to get rid of this unstable sensation! 

And another terrible aspect of it, is that being so worked up over the symptoms causes my heartrate to skyrocket.  

Also, I'm suspecting that I'm starting to go into a downward spiral with the xanax, and the er physician advised that I may be experiencing withdrawl in between dosages, because apparently you start withdrawal even if you take a dose that's consistently the same, since you build up a tolerance.  That's my layman explanation anyways, excluse my lack of medical eloquence.  So lately I've been taking around 2mg a day, whereas before I was fine with 1mg.  And considering the state I'm in lately, 2mg is barely cutting it.  I'm allowed up to 3mg a day, per my doctor's instructions, but I really don't want to keep digging myself a hole with this medication.  At the same time, I don't think I can handle the tapering process, since even taking the same amount that I was normal taking was causing me to have elevated anxiety, so I can only imagine the effect a lesser dose could have.

Someone suggested I ask about switching to klonopin, since it has a longer half-life and supposedly is easier to taper from.  Any thoughts on this?  My GP isn't much help in this scenario, he recommends more xanax, and my psychologist isn't much help either.  I start better insurance in a few weeks, but until then I'm wondering how I'm going to manage, and I have a lot of crucial life events impending (grad school graduation, new job starting, etc.).  

It's so frustrating, because there are some days, like yesterday, where I feel perfect, and some days like today where it's all I can do not to head to the hospital (which would be quite costly considering my old insurance just expired and my new coverage doesn't start until the first of next month).  So I'm kind of in the middle of a crisis, the likes of which I haven't experienced in years.  

So sorry for going on a diatribe, I can't broach this topic with many people in my personal life, my family will become too worried (guess what, they're anxiety prone too), and I'm afraid how coworkers and certain friends would perceive me (the mentally ill stigma is something I want to avoid).  

I really could just use some reassurance, some input, something.  I've found this board to be extremely helpful before, and knowing there are kindred spirits out there brings me solace; although, I would not wish this condition on anyone ever.