Sense Sonnet - Chiller

Unforseen

I had a bad stomach ache, so
At the clinic, I got a shot
In the arm that was apropos
Medicine that I'd had a lot.
The needle accidentally
Punctured an artery, so that
Later, gangrene set into me.
The doctors took a hard look at
My medical situation,
Then gave me the unwelcome news.
I needed an amputation.
Life or limb - which one should I choose?

How could I lose, for heaven's sake,
An arm over a stomach ache?