You seem to be having symptoms of heat intolerance could be hypothyroidism.
I suggest you do a blood profile of thyroid profile. Hypothyroidism is characterized by increased heat intolerance. I suggest you take Tylenol for pain. I also suggest you take an X-ray of jaw. Could be a lytic lesion, which can be cured by taking increased calcium.
I also suggest you to work out to limits of your body capacity. You can end up with muscle exhaustion, finally leading to muscle tear. That explains your tightness of chest and muscle pain all over your body suggests you take blood profile and visit a physician, who will prescribe Levothyroxine.
You should be fine in few days of treatment.