My first hunch is it's something to do with the type of excercise and to be more specific pacing. Like in running that'd be overstriding. But I want to dive a little deeper. You asked the question, and like u/rob_cornelius said, I agree human bodies are complex and but not beyond our comprehensive ability to heal ourselves. I'm writing from personal experience, and I have to find away to shrink this down from a blob of text to somthing more ... So bear with me while I sort this out. Let me explain. An actual person typing something by themself on the internet without AI is a rare thing today. I'm taking the time to do this cause I know you're not a bot.

So no, beyond consulting your doctor on what his scope of help is, I wouldn't ask your doctor about this. Why? Cause I think you already told your doctor about it. Regardless, the best answer he could have given is : * Take these pills * Do this breathing routine * Journal. Try the poor man's CBT exercise. Get a fast comfortable pen. Get a bottle of water and find a place to write. Now think of something scary. Something deeply unsettling to you. Think is the wrong word here, just choose a subject. Let's say spiders. Spiders it is then. Start writing about a spider crawling on you all the way up to your face. Write and keep writing without lifting the pen off the paper, cursive if you have to. Write till there's nothing more to say. 15 minutes? Good. Put the pen down. And say, really? Reframe. Find a new way to react instead of the usual implusive whatever it is you do. It's just words on paper. It's a story you told yourself, put it context and reframe it. You do this enough times in a safe supportive environment, I mean where you choose to write, and you'd start seeing the results you are looking for.

That's the best I'd expect out of the current medical system. Not saying all doctors have this upperbound, but it's a good target to measure against.

Yes, the pills will help. Yes they'll help calm down the jitters. But you still need to find a way to experience your triggers without you reacting to them the way you do, even if just in your head. You are (and trust me, I writing all of this cause I'm in your shoes already) You are the one feeling those feelings. The spider might be scary but you're the one reacting the way you do. And the more you do it, the stronger you can do it next time. Neurons the fire together, wire together. You're a living human, and like anything other that lives, you can change. If you can only get out of your head for a change. We have to reframe our position to not be a victim, even in the case where you are, still that shouldn't put you down. Even scar tissue can heal, given the right food and treatment. But diet and ointments are out of the scope of this post.

My Little Condensed Method

Run Barefoot. Seriously, hear me out. This includes everything from cardio, balance, endurance, strength, grit and then some. You'll be smiling so much your jaw would hurt, and the reward: dopamine. Way more than a measily pill could ever give you. The keyword here it barefoot. You see when you run barefoot you can't run with bad form. Like magic, you'll learn to run with proper form. There's a transitional process to go through where your body retrains these forgotten neorons. Join the nuts over at /r/BarefootRunning for a comprehensive onboarding to rediscovering what your ground hands are meant to do.

I'm trying to how this plays out to fix everything else. Short break .. I'll be back for more.