It all depends on your compant's policy on overtime. If they state that overtime pay and work is not allowed, they can actually terminate you for working hours over your scheduled shift. If they allow overtime, they must pay you that time. Each state has different rules in regards to overtime pay, and I would check with your state agency. Also, a certain amount of days without a break (example 6 days in a row) as long as the hours work out to 40 per week, that extra day of work would not be counted as overtime.