Soreness surrounded by chest/heart - is it lately stress?

I've been under a lot of stress lately, and surrounded by the last week or so, have been experiencing unusual tightness or soreness contained by my chest/heart area.
he days before that, I was fancy that my blood pressure must be high, as I had a racing heart, and headache. Occasionally, my heart seem to do a very hard "thump", or a strange irregular beat.

That's mostly calmed down immediately, but now I have this tight feeling. It's OK first piece in the morning, but by lunchtime, I notice it, and it gets relatively bad by evening.


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