Agreed. I am going to include a pointer to the so-called White Collar exceptions. The federal FLSA law establishes the normal minimum wage and overtime rules that so-called non-exempt employees are subject to. There are something like 100 so-called Exempt exceptions to these normal rules. The most commonly used exceptions are the White Collar exceptions. In your case I would look at Administrative and Executive. Look at the exact wording of the rules (the government will).
http://www.dol.gov/whd/regs/complian...a_overview.htm

One last point. You said you are working 3 different jobs. The government will not agree with that. From their standpoint, you are working a single job with varied duties. But that is a door that swings both ways. If you are really Exempt, then that is determined by looking at ALL your duties at the same time. If you add enough non-exempt tasks, you can eventually risk the Exempt status of any otherwise Exempt position. Job titles do not matter. Actual job duties do matter.