Welcome to the MedHelp forum!
Unexplained aches and pains coming on and off could be due to fibromyalgia, chronic fatigue syndrome, rheumatoid arthritis, lupus, Crohn’s disease, H pylori infection, anemia, liver disorders, diabetes, hypothyroidism, Vit B12 or Vit D deficiency and due to calcium or magnesium deficiency. It can also be due to sleep related disorders.
Do discuss this with your doctor and get yourself examined. Take care!
Having Degenerative Disc Disease, Rheumatoid Arthritis and fibromyalgia, I will try to answer your question. My RA is in my joints only. Fibro is all over discomfort. If you have pressure points where it REALLY hurts when you press on it, like back of your neck, your shoulders, then you could have fibromyalgia. See a Rheumatologist to really get answers. Lyrica has been my saving grace! Nothing takes away all the pain, but that and elavil at night really really help me. When you say "pain extends out to both elbows. Almost like cramping pain" sounds like you might be having withdrawal from vicodon. I have suffered exactly how you described it from withdrawal from vicodon! I felt pain shooting out from my elbows, it was bad. It is so easy for your system to get used to vicodon. Go off slowly. Oh, another thing. It is said that when we are pregnant, our arthritis goes into remission. Did you have this pain while you were pregnant? I hope this has helped you somewhat. Take care my dear.