What were your actual numbers (total, LDL and HDL)? Due to aggressive marketing from the drug companies selling statin and other drugs, the ranges for normal reading are getting lower and lower. So your slightly elevated number might be just fine, especially if your LDL is high.
Did you know that there is actually no proof the high cholesterol causes heart disease, or that lowering cholesterol reduces the risk of heart disease? Mind blowing, isn't it? There's actually test out there that's a better predictor of heart disease called the VAP that gives a more precise look at the type of lipids in your blood. You can have one kind of lipid carrying a lot of LDL ("bad" cholesterol) that passes easily through your blood stream...like large cargo ship going through a harbor...that would look "bad" on a regular cholesterol test but wouldn't actually elevate your heart disease risk. On the other hand, you could have a lot of a smaller, sticker type of lipids that don't cumulate to an overall elevated level of cholesterol but all together, do clog your arteries - like little row boats carrying small amounts of cargo through a harbor would cause a traffic jam.
At the end of the day, cholesterol is a response to inflammation and for most people, inflammation is caused by things like sugar, simple carbs, dairy, and other foods. It never hurts to improve your diet and increase your activity level, even if you are thin, so start with being more careful with what you eat, add in some exercise and see if that moves your numbers in the right direction.