what happens when your body brain collides with your heart?

you are having a supposed good day. well, you have nothing to be upset over.
i mean, nothing to really turn your tables.
But, you just feel that its a bad day.

my brain tells me that nothing's wrong.
everything's okay.
but my heart just pounds and pulsates,
pumping probably much more blood at a faster rate.
to get me fired up.

well, i blame my monthly curse.
i do have a love/hate relationship with it,
but i do hate it most of the time.
makes me feel out of sorts.
and it also psychos me to think that I'm fat.
phwoaaarrrrrr.

the truth hurts but a lie's worse.