Hi . My heart rhythm is actually in the fast side with arrhythmia. Fatigue is really from my autoimmune . Did not feel the fatigue until late 2017 and more in mid 2018. I just finished with an autoimmune flare up last week. My rheumatologist was tapering my steroids but my immune system attacked my lungs. My pulmonologist thought it was another long drawn infection until she noted my lingering low grade fever and fatigue despite the antibiotics ... I was on three sets of antibiotics for 6 weeks. My pulmo increased my steroids . My low grade fever was gone and I started to recover. My rheumatologist further increased my steroids and added addtl tab of immunosuppressant drug. I started tapering off again today April 2. As suggested in this group about tapering prednisone, we will do it more slowly and maybe just go 1mg less after I reach the 10 mg marker that suits me. I’m now on 15 mg less 2.5mg today for the next two weeks