every five seconds

I am uncomfortable
sitting on a hard bench
blood in my underpants
because periods come early sometimes.
My heart rate is up again
I am breathing fine
but I feel like I'm running
out of air, a feeling that you'd think I'd be used to
by now but I'm not.
Sometimes when I'm walking to class
I wonder what would happen if
the earth ran out of oxygen.
I don't think I'd notice right away
because sometimes I catch myself
holding my breath
when I'm stressed out
or trying not to panic
(every five seconds)