Bronte, welcome to the forum. It is a little scary tackling the cholesterol levels whilst eating fat. I was lucky in that my cholesterol has always been ok, but actually eating more fat (as in MUCH more fat) has improved those numbers even further! I eat fat to the level that would have most dietitians doing fits but I've lost over 4st since November, improved my BG readings to non diabetic levels, reversed a fatty liver condition (which I was told I'd need to reduce fat intake completely to do and then it would take months to years - mine normalized in 2 months!)
There are plenty of other on here who have had bigger cholesterol numbers than me, hopefully they can reassure you more!
Dave