Eating chalk? Or....?

I was messing around with Chalk in school because I was bored while the teacher was yapping on about maths and gay stuff.... I got it all on my hands so I went to the toilet when it was lunchtime to wash it off... It came off a little bit. A bit was there still on my hands. I then came home and ate with my hands while the chalk was still on my hands. Does that count as me eating chalf? If so... what will happen to me at the worst? I know it's a bit stupid me asking this.