Thyroid numbers look great. You can still do the waking body temps and if low, you then have a reason to test rT3. If ferritin is low, that has thyroid implications. Gut diseases can cause blood loss that lowers ferritin. Other markers of that would show up in a CBC, complete blood count.
Yes, you need to inject more often. This is where injecting small amounts with insulin needles is useful - see the stickies.
If total cholesterol is too low, many problems can occur. You probably have low energy levels from statin induced CoQ10 deficiencies. Find a CoQ10 product that is "ubiquinol", an improvement to basic oral Coq10. Suggest 50mg, but take 100mg for two or three weeks to make any changes more evident. Total cholesterol around 150 or lower is associated with increased all-cause mortality. Life expectancy is reduced. Ideal total cholesterol is considered to be around 180 with a healty HDL level.
Low CoQ10 can eventually lead to congestive heart failure, so then you do not die of a heart attack. Early signs of this process is a nagging persistent cough that never goes away. I ID'd that in someone earlier this year and ubiquinol made that go away, as well as some joint pain. One can also have muscle pains from statin drugs lowering CoQ10. Statins can also cause mental confusion and/or libido problems. CoQ10 may resolve those condition as well to some extent.
CoQ10 is important for proper mitochondrial function and you cannot live well without that. As well as CoQ10, one can take acetyl-l-carnitine, lipoic acid, b-vits, anti-oxidants, fish oil and others.