You will be fine. I learnt this first hand from my mother who is probably the worlds tightest person lol.
We live on a potato farm, and harvest about 1000 tonnes of spuds a year, yet she still insists on feeding us on the rejected stock feed and green ones.
You're going to eventually turn into a potato.
Seek medical advice. If it was within the last 24 hours you may just become a Jersey Royal, after that period you're going to become a King Edward.
They're highly poisonous and you will probably end up in hospital.
Plant it! More potatoes can only be a good thing.