For me, this does sound like anxiety . . . in the beginning, it was overwhelming for me until I started to take apart the anxious thoughts . . . then I realized I had what I call anxiety brain and reality brain . . . if I used reality brain to look at the thought and break it into parts, then I began to figure out that the thought was not very likely. For example: when I had a rapid heartbeat (before I knew it was thyroid related), anxiety brain would go into overdrive and my blood pressure and pulse would increase and I imagined that I was having or going to have a heart which only increased anxiety and blood pressure, etc. On one occasion I ended up in ER. On intake, my blood pressure was something like 190/100 with a pulse zooming around 95. I was put in an examining room and waited with a nurse for about 5-7 minutes for an ER doctor. When my blood pressure and pulse were taken it was 125/70 or so and a pulse of around 65. They ran all sorts of blood work, etc. and released me about 6 hours later. I used reality brain to figure out that while there was medical help within easy reach, the anxiety was dispelled but once on my own, anxiety brain kicked back in and started telling me it was all a "trick". Eventually, I used reality brain to say . . . . look, you were checked over and there is no physical issue with you that was heart related so either there is another type of physical issue or there is some trigger in your life that is causing the anxiety. From there, we discovered my issue with thyroid and while I was awaiting treatment, they gave me beta blockers. Once the rapid heartbeat subsided, reality brain was strengthened to see my trigger (not knowing what was causing the symptoms) to see the symptoms as manageable. So, while awaiting treatment, I started eating properly, walking, using mindfulness to say to anxiety brain . . .look, back off, reality brain knows what is causing the symptom; thank you for putting me on alert but I no longer need your input. So, when I was flooded with anxiety, I would break off little pieces and in my mind stretch it out until it became so thin that it disappeared. Coincidentally, around this time, I saw a rerun of a Star Trek episode with Captain Janeway when she encounters a clown representing fear (which for me is the equivalent of anxiety). I always remembered a line that went something like the captain saying "I've known fear. It's a very healthy thing, most of the time. You warn us of danger, remind us of our limits, protect us from carelessness. I've learned to trust fear. but like all fear, you eventually disappear." So, I guess, when anxiety hits, I break off pieces, stretch them thinly using my reality brain until they eventual disappear and reality takes over.
I think that because anxiety is so individual in a lot of ways, that a person just has to keep on trying new tactics to manage it until you hit on a set that is meaningful to you ., . . . I cannot say that I enjoy the process, but I do feel a sense of achievement when my strategies work for me. . . .and they do not always work because life events occur and change with different players and different types of circumstances which means that I have to create new strategies . . . but, I would say, for me, I'm pretty good 90-95% of the time which is a vast improvement of my prior existence of living 24/7/365 with anxiety creating a vortex of unmanageable thoughts and emotions . . .
Don't know if this helps, but think about the activities and thoughts that will help you to disassemble your anxiety which, in turn, may make it easier to development management techniques and to dispel the anxiety . . . .chat with you soon, take care, kc