Wow, HoW makes a great point. I don't know what a normal heartrate is. I believe that if you're very fit it might be lower than if your fitness is more average. But it sounds like you're talking about a change for you that doesn't feel right. For me, that trumps anything a "normal" range could tell you.

You've got a lot going on, and it sounds like you're peeling off the new stuff to try to target what's affecting you. That's what I'd have to do. Better to have done one thing at a time in the first place, because the flurry of activity is obscuring the possible source. I've done the same thing (changing too much at once), and it's a mess to clean up. Since you're in problem-solving mode, you'll figure it out eventually.

That being said, since you said the sole plus the extra 1/2 teaspoon salt was all added recently, I'm very suspicious you're overloaded with salt. It may either be too much too fast, or just too much. Hard to know. Your body takes about five days to adjust to incremental increases and/or decreases (I usually change 1/4 teaspoon at a time), and unless you give it the time it takes, you can have a mess on your hands. Consider reducing the salt to a much lower level, for instance 1/2 teaspoon total per day. See what happens over five days. Try to breathe and stop throwing things to see if something magically fixes your problem. It takes time for your body to speak.

I'm really sorry this is happening to you. I hate when this happens to me or DH.