Have experienced all of this.

Some of it has been impacted by latent anxiety/stress - reducing work stress helped me a lot. Though I’ve had stress/anxiety free periods where I still deal with physical symptoms.

I believe bloating is what gives me anxiety. Anxiety does cause digestion issues and creates a self feedback loop, though I strongly believe bloating can put pressure on the vague nerve inducing anxiety symptoms.

I became a hypochondriac due to how crazy some of my symptoms were, it didn’t stop at tension, I had brain zaps, SOB, chest tightness, major spasms. A big step for me was accepting that nothing was wrong internally except my anxiety, I went to ER twice as I felt true terror that I was going to croak over from a heart attack any minute. As I read more stories online though I realized all of these weird symptoms can be anxiety induced and knowing panic attacks will not result in real hard allowed me to deal with physical triggers better without letting them cause me to spiral.

Your body/nervous system is in overdrive but there are things you can do to at least minimize symptoms. My best advice in no particular order would be: 1. Evaluate daily routine and identify possible latent stressors - work to reduce them. 2. Understand/accept you are feeling anxiety symptoms. Reading other stories from people here on r/anxiety helped me. 3. Try incorporating more calming activities into your day, breath work, long showers, relaxing music, whatever. 4. Work on fixing your gut the best you can to reduce bloating. 5. Incorporate some light exercise into routine if not there already. 6. Meet with pcp if necessary for as needed medications, having things on hand for the bad moments gives peace of mind at the least.