Hi mskitty, and welcome to the forum
I had been going to post to you, but your first post was put on the "sticky" and not easy to post to.
I feel you should take some L Carnitine to overcome lactic acidosis, the primary function of carnitine is to escort fat into the mitochondria for metabolism, but it then takes away the "combustion" products, without which action lactic acidosis occurs, and this appears to be responsible for muscle pain.
Spacedoc would like you to email him on **firstname.lastname@example.org
and he has some info on mitochondrial mutations you may wish to see. ( remove the ** from the address)
Your leg weakness could well respond to the carnitine, "endurance" muscles as in legs and trunk have a greater need for fat rather than glucose for energy production, and so need L carnitine, A fairly slow build up of the dose is usually a good way to start, to avoid the possibility of GI problems, but usually a large dose of about 2 to 3 grams daily is needed to cause this effect. Try starting with 500 mg a day, first thing in the morning, and increase by another 500mg after about 3 days, and so on until you feel benefit or your bowels object, when reduce by 500mg for your dose to carry on with.
Both Q10 and carnitine are necessary for the function of the mitochondria in producing ATP for energy and I hope you have not got actual damage to the mitochondria, work in progress at Harvard Medical school suggests that some statins and other drugs damage the mitochondria themselves, but often the supplements give a large measure of relief, and mitochondria are capable of increasing by division, so hope for the best!!, and I hope you obtain some relief.