I Am 56 Years Old, Male 5foot 6 And Weigh

I am 56 years old, male 5foot 6 and weigh 119 kilos I am a type 2 diabetic ,have chronic sleep aponea, arthritis in most joints ,menieres disease, high blood pressure, I have problems with my legs swelling whenever I wear shoes, I suffer with cramps in my legs most nights,I suffer with pains in the ankles and knees particulary when walking on a down hill grade or on cement in shopping centres or streets and pain does not subside even when lying in bed at night ,I am on meloxicam this doesnt help much but if I happen to miss them the pain gets even worse.Thank you for any help you can give me. This is not related to my heart or lungs as I've recently had an angiogram and also chest x-rays and stress test