I have experience this, however less extreme. This past summer I decided to take control of my anxiety/ panic and went on medication (SSRI) and the drug didn't agree with me at all and sent me downward before I rebounded. I'm close with my family and have lots of friends so there are always parties and get togethers and they were almost unbearable to handle with the anxiety. At that point I was in a mental place where I thought substances would get me away for a little from it, so on top of the SSRI I'd take benzo's, drink heavily, smoke weed, massive amounts cigarettes and sometimes harder drugs. I must admit, it did get me out of my head for a while, but I felt so horrible the days after and anxiety just came back worse!
I went completely clean for 2+ months, and quit taking the SSRI that was like Poison to me. The best "drug" I've had is hardcore exercise. None the less, after this I was naturally afraid of what alcohol might do to me, so the first few times I drank I was tense, nervous and had the self doubting thoughts that accompany anxiety. Boom, one drink your head is light and you're feeling sick. You wake up tense, dizzy, anxious. You let your brain kidnap you. Over time I've learned to control my thoughts, CBT is great, and I can now really enjoy drinking/what not and going out with friends. Once you learn to relax into it I find the experience actually releases me from my anxiety for a few days because I'm filled with the good thoughts and good feelings of that night!
Also, don't forget, if you're on any medications, SSRI, benzos etc they would be a physical cause for this.
Your brain chemistry does change as you age, you can never rule that out.
Finally, DIZZINESS! It's awful, right? Well, its physical, meaning your brain has to be telling your body to do something. Next time you're dizzy try the following:
1. Check if you're clenching your teeth! That's my cause of day to day dizziness.
2. Check your blood pressure! Your amygdala is constantly making an anxious body release adrenaline, your BP may be low or high when you feel dizzy
3. Feel for tension in your head and neck, tight muscles will throw off your equilibrium.
4. Could you be dehydrated? Definite cause of dizziness.
Those are just a few possible causes!
I would also earnestly suggest you go see a Dr. and therapist, some of them are great and some drugs do work great for people. If you're feeling extra tense, nature does also supply a natural tranquilizer that will gently sooth you rather than plaster you, Valerian Root. Much as a benzo does, it acts on the GABA receptors, calming and sedating a bit. The easiest way to get it is through Celestial Seasonings sleepy time extra tea. It brings me down in the evenings when I'm feeling extra tense.
Sorry for the novel by the way, I have just studied anxiety and myself so much I feel like I've figured some things out now that would have helped me a year ago, so I can't help but share.
best of luck to everyone,
Steve