Was in a school that was old and had asbestos in it when i was 9 - 11 years old (so 2 years). now 33 years old and i'm pretty healthy, exercise, i don't smoke, no family history of meso. what are the chances of getting mesothelioma? should i worry?

This is close to zero. The affliction is common to people who worked with the material which was often airborne & inhaled during their use. Insulation fabricators, oilfield workers, housing construction or rehab, etc. Asbestos that is stable inside a paint or structure is not what I consider an exposure, no matter how long you spent inside the school.