This sounds like you bruised the inside of your neck. This happens to me a lot with sharper items. It feels like it's there, but it just temporarily bruised it. If it doesnt go away in a couple of days, be concerned, but with me, it lasts maybe a day.
You probably caused an abrasion to your throat. I have done this a few times with those free chips at mexican restaurants. It took about 4-5 days to heal. If it gets worse or lasts longer than 4-5 days visit a doc to make sure its ok.