3. You may also feel dizzy. This is also from the lack of blood flowing in your body.
If your brain doesn’t get enough blood – you feel dizzy.

Image Credit: YouTube / BioDigital, Inc.
4. Feeling cold, clammy, and just generally not feeling good are also signs.
Beware of cold sweats, which mean your body is stressed.

Image Credit: YouTube / BioDigital, Inc.
5. One month before having a heart attack, many patients stated they had some cold or flu symptoms.

Image Credit: wedmd.com