i'm sorry you're going through this. the symptoms you're describing could be caused by many conditions but a likely culprit is some sort of spinal issue. spinal degeneration is not uncommon as we age (though i don't know how old you are) and a ruptured disc in the neck can happen to anyone. either of these conditions can cause aching and tiredness of the limbs. i'd suggest you go back to the doctor to ask about these symptoms because it sounds like further testing might be warranted. blood work won't help diagnose a spinal injury or degenerative disc disease. i wish you all the best!
i ache all the time mostly my neck shoulders arms and hands and tired all the time. bloodwork came back good