another big thing that should be checked but probably was not is your magnesium. this has a very direct impact upon the muscles,even more so than having low postassium. while low potassium usually causes more crampy muscle type pain,low mag would cause some pretty intense spasms almost any place you actually have muscle. my son had both the low potassium(gave him calf cramps, really bad ones) and low mag the following week while in liver failure,the low mag caused some really horrid muscle contractions/contorsions along with very "snappy' like muscle flapping and finger spasming in his hands. very very insane stuff,just from the low mag. the low potassium had already been corrected,but when they had checked that on the routine test,for some reason,the mag is not a part of that basic metabolic panel,so we didn't have a clue. i ended up taking him to the ER that night the flapping and contorsions just started out of nowhere and they did check his mag and it was very very low. there is a reason why they call magnesium 'natures little muscle relaxer".
once we started supplimenting his mag with mag ox 400,he was fine and the muscle nightmares stopped. this is something that just should also be checked out considering your symptoms. while it may not be the sole reason,it could be playing a big part in it. then it would be a matter of finding out why the mag is low. just really checking out all minerals and the chemical balances(and also a kidney/liver panel) should be done in your case. certain conditions just tend to deplete(or actually build up) certain things in our bodies when they are not functioning up to par. in order to arrive at any real Dx of any condition its just kind of test and rule out,or in. but i would get this done as soon as you can. something is causing this to occur in you and simply needs to be found out. good luck with this and please keep us posted. FB