Majority of cholesterol problems are because your body produces it in the liver, thus you are pre desposed to producing high amounts of cholesterol.
I know of tubby people with normal reading and real skinny ones with very high levels.
See a doctor and do something about it, Lipitor is very good, I use 10 mlgms per day and it keeps me under the upper desired level, also if you use lots of niacin on your breakfast muesli and eat bran muffins also help.