I did this. My family has a history of high cholesterol. My dad had a heart attack at 50ish. He's also a cardiologist. Yeah, really.
Believe me, I worried. Blood tests before primal: high cholesterol, high triglycerides, pre-diabetic, nothing that looked promising. Blood tests after 3 months of primal: low triglycerides, high HDL, and totally normal blood sugar.
I really recommend doing exactly that if you're serious about this not being a joke to you. The blood tests aren't super expensive, and if it's what you need to know you're doing the right thing, I say go for it.
As an aside, my husband's LDL cholesterol couldn't even be calculated pre-primal. We've now seen a reverse in that. We're still working on getting his bloodwork in shape, but I suspect next time he goes in to test, he'll be in normal ranges, too.