Wait a minute, your HDL is less than 15? That is VERY (extremely) low and HDL is the good, protective type of cholesterol that you want to be high, NOT low. You want your HDL:LDL ratio to be as much HDL as possible. Less than 15 is terribly low. You want your HDL to be at LEAST 46, per the information I was just given with my results from a similar job-related blood work-up I had to what you had. My HDL is awesome at 86 (anything over 70 is in the protective range, protecting your heart from plaque building up in your arteries).
If I were you, I'd get to my primary care (if I had a primary care, which I don't--I can't find one that i don't detest, but I digress) and get a full panel of blood work and a complete check-up. I don't like the sound of that HDL at all.