Yep - multiple doctors with no conclusive results (been there done that) points squarely to TMS. They're looking at the physical, so they will never find the source. But now you know!
On the Skype therapist, if he/she helped, why not continue?
As for the question of a double-whammy of anxiety and numbness versus anxiety causing numbness, nah, I'd say TMS is behind both of them. Flip-flopping between symptoms is another TMS giveaway.
As for prolonged repeats, yes, I meant if you keep expecting/waiting for the anxiety/numbness to go away, it will prolong that baseline anxiety. Don't wait for it. Just get on with your life and in time, believe me, your brain WILL get the message and you won't even notice it. But you do have to do the work of exposing and digging up the repressed stuff that your brain is trying to protect you from. Hence continue the therapy or take up TMS journaling or take advantage of any of the awesome resources here. Find whatever works for you.
As for not avoiding anything that may rev up the nervous system/cause anxiety (you mention working out, caffeine, and social situations) to use them as an opportunity to practice the Face/Accept/Float/Time technique, be careful! The answer is: YES, NO, and YES!
YES to not avoiding working out. This is one of the principle tenets of TMS as well as Dr. Weekes' anxiety treatment. Working out will actually minimize the occasions of anxiety, not bring them on! Bear with me, I know this may sound counter to your experience. Initially it feels like working out is only revving up the nervous system. It's not! The confusion is that working out and anxiety both rev up your heart, but one is voluntary (working out) and the other is involuntary (anxiety) and THAT'S the key. So by all means, get that heart racing on YOUR terms (a good normal workout), and watch how the heart stops racing on its own terms (anxiety). Poor strength and cardio are occasions for more anxiety, not less!
NO on the caffeine. Now, mind you, I'm a soda drinker myself, and I definitely bargain with my brain ("I know you're going to give me anxiety later this evening if I drink a soda with my kid right now... but I'll take it!"). That's different from "I'm going to drink this soda just to practice FAFL (Face/Accept/Float/Let Time Pass)." No, that's not the idea. You don't want to invite more anxiety than you need to. After all, isn't life anxious enough with that annoying baseline anxiety? So no to taking caffeine (whether drinking or smoking) just to test your technique. Take caffeine if you're willing to suffer the (mild) consequence and know that THAT isn't TMS related (though getting rid of TMS anxiety will make it A LOT easier to handle caffeine! - but that's longer term, once you've gotten the TMS in check). And thirdly:
YES on social situations. THAT'S a perfect candidate for practicing FAFL. We must stop locking ourselves away from other people because anxiety is trying to run our social lives (or lack thereof). No, sir. Anxiety has NO BUSINESS telling us when we can and can't socialize. You make your plans, and you keep them, anxiety or not! (You're telling it who's boss. And again, in time, it WILL get in line. In the meantime, FAFL that S.O.B.! And if you get the shakes in a social situation - GOOD! LET THE BODY SHAKE ALL IT WANTS. It's not the boss. YOU are.)
So as far what activities to avoid, the short answer is none. Some folks with TMS pain (yours truly) HAVE purposefully done things they couldn't do before just to spite the pain - and it works! It STILL hurts right now to sit on certain chairs. My tailbone SCREAMS with that pinching pain. But guess what? It's screaming a lot lower than it did 2 months ago. It wants to play? I'll play! I'm SICK of it telling me where to sit and not sit. (Getting the picture? We're literally taking control back of our conscious lives that have been hijacked by our subconscious, and not in a malicious way. The brain isn't trying to PUNISH us, it's just trying to PROTECT us. But it doesn't always know that we're okay now and don't need its protection.)
"Face + Accept + Float + Let Time Pass basically means to Face symptoms, Accept they are happening, Float by not fighting them or worry about them, Letting Time pass while doing these?" - Close. You got the first 3 right. The last one means Let Time pass not while doing them, but AFTER you do them a million times. It's the outcome independence thing.
You then summarized stuff perfectly with your last bullet points. And speaking of bullets, I'm humbled that I can help you bulletproof your treatment! I did exactly the same thing 3 months ago after reading the book! I saw tons of YouTube video testimonials of TMS sufferers that have found their cure, and in time I became one of them.
My name is Joe Tunon and you can see a complete video testimonial if you search for me on YouTube. I'm also on Nichole Sachs' YouTube channel with my testimonial. She's got an awesome way of journaling for TMS chronic pain.
No shortage of resources here and out there! Find what works for you and kiss your anxiety and numbness goodbye, because they're days are numbered, my friend!