Re: Flushing in face
Lots of non-scary (but most likely) causes for blushing, including psychological.
Shortness of the breath is common with anxiety. If shortness of breath is caused by disease - then your oxygen levels would be affected.
I think you're being irrational, but then that's what HA is...
Hopefully your physical tomorrow will reassure you that there's nothing wrong with your heart etc - all you have to do then, is accept it.
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A thought is harmless unless we believe it.