Welcome to the WHL forums Pauline. Your language seems fine. If you are taking meds for thyroid issues, those can make you sun sensitive, as can other meds. Also, if your thyroid is low, it can make joints swollen & painful (and make you feel tired). The thyroid can be attacked by an autoimmune disease (blood work can tell that also). Keep after your doctors for answers. Hope you get some answers, and relief from your troubles.
"There but for the grace of God, go I."
"... His mercy endureth for ever."