Hi Does anyone know what these symptoms mean please?

For the past 8 weeks my husband has had Swollen legs,Feet, Hands, Aches all over, Fatigue, Lethargic, Exhausted, Can't sleep. His bloods are saying he has low iron and his thyroid is 9 which is low but shouldn't cause these problems apparently as 8 is low! He's now on thyroid tablets. The doctor is baffled.We have a hospital appointment on 11th July with the hematologist. please help as we are really worried.