Hi! Had a form of pneumonia caused by probable auto immune disease - as yet undiagnosed. Although the lungs are behaving better, I still have extreme tiredness and a very high hr and pass out regularly. Does anyone else have similar experience and what can I do to feel/ function better. Have already cut down tea and rest as much as I can. Its such a long process as now I have to transfer from respiratory to cardiology and rheumatology! Am very achy (back, knees hands wrist)which makes all chores And sleep!) difficult.