Polymer Lithium Ion battery toxic?

The battery of my iphone 5s was accidentally cut open while being repaired, is there any negative health effects to breathing in whatever the horrible smell coming from that battery was, I have a weird taste in my mouth and breathing feels weird. I wasn't exposed to it for very long. Should I be worried?

Added (1). UPDATE - I'm no longer feeling weird really but still anything I should worry about?

I wouldn't be worried unless the effects last more than a day,
but if it did last longer than that I would seek medical attention.

If it wasn't ingested it should be alright though you will have to get another battery pack and clean the area with some isopryl alcohol

Hi yes it is cancerous material so should be slid into a poly bag and taken to a phone shop for disposal