I assume you mean Lead. If that is the case go to the hospital, lead is toxic and you may need to have your stomach pumped depending on the amount of lead you ingested. If your talking about pencil lead which is graphite then no harm will come and if you meant l.e.d. than again nothing.
Nothing happens
you die...
you die
pain
You Die
You can get chemical burns along your throat and stomach if you swallow lye.
you turn orange
You burp bubbles
You Swallow Or you slobber Or your mouth chokes You Swallow Or you slobber Or your mouth chokes
It depends on how much you swallow. If it is a large amount, you could get diarrhea and/or vomit.
This too will pass.
You'll choke and die