Hello & welcome to Just Answer.
Probably what you had was a deep vein thrombosis that dislodged a clot to your lung. May I know what all tests have you undergone so far?
Thanks for all the additional information.
Have you undergone a thorough eye examination?
How much is your HbA1c, if that has been tested (for diabetes)?
I am sure that your doctor would pursue testing further for the diabetes as your result was 113. What you have here is fibromyalgia, which could have any number of possibilities and reasons. If your blood has not been tested for ANA, I am sure that your doctor would do that soon.
Yes, your doctor was right in saying that an ophthalmologist would have been able to make out more from the yes if you were having autoimmune diseases, because they generally leave some telltale sign in the retina of the eye. However, since your blood tests are normal and your ophthalmologist did not find anything further, there seems to be no reason for unsettling you so much. Please cheer up for now.
For all these illnesses, and all at a single time, I believe that you must be stressed out. Your burning and cooling over knees and radiating to your elbows could be one of its manifestations. You must take control on your stress. However, it will require study for any impingement of the nerves arising from your spine, if this problem persists.
You are right in expecting a diagnosis so that you could move on. It should be somewhat reassuring for you that so far all your tests have come out near normal. That leaves a little chance for arthritis or lupus. However your ANA test, C-reactive proteins and test for RA factor would have to be done to be conclusive. A repeat test for sugar and a follow up eye examination would also be beneficial.
Since you don’t have stress, this problem of burning and cooling could be because of some nerve that might be getting impinged. It would require further testing.
When every other possible reason has been ruled out for the pains, it then falls into the lap of fibromyalgia and the treatment then remains by and large symptomatic with having to resort to using steroids when the things flare up.