This is a UK-based site, When people post questions at 3.20am my first thought is to wonder whether the questioner is actually here in the UK or in the USA (or possibly in Canada).
If you're in North America we won't be able to help you here because our laws are different to yours and it's unlikely that anyone on this site will know about them. Please post again on a US site, such as this one
http://www.answerbag.com/
or this one
http://answers.yahoo.com/
However if you're in the UK your question is based upon false information anyway. "Young workers" (i.e. people who are beyond school-leaving age but still under 18) can't be employed for more than 40 hours per week:
http://www.direct.gov...itiesatwork/DG_174530
So (assuming that you're in the UK) you've clearly got nothing to worry about because your employment has always been 'within the rules'.
Chris