Hello Thanks for posting at HCM. I have gone through your symptoms. Because your decreased activity of your adrenals, you have chronic fatigue syndrome. Hypoadrenalism also causes loss of weight which also makes your chest wall thinner, thereby heart gets more closer to the rib cage and when you lie on your side you can feel the vibrations and leadinf to subjective feeling of palpitations. It is not a serious thing to be worried about. You have to be on replacement steroids to keep up with your adrenal functions, which i suppose you already on. Long term steroids can lead to osteoporosis or softening of bones so you need to be on calcium supplements and biphosphonates to keep your bones strong. BP is slightly on the higher side, so i suggest regular monitoring of your blood pressure for three weeks and if three of these readings at rest are persistently higher, you need to be started on blood pressure medications. As of now i feel there is no requirement of blood pressure medications. You may so worrying about the heart beat sensations. Wishing you good health Regards