LIghtheadness I had only when I stood up to fast but not to the degree you say and I had the feeling I had a waterhat, The degree you say I had a few weeks ago but that was only once. It was strange. I was sitting and only moved my balance to relieve the pain in my upper leg and pelvis area as I do automatic now. and the pain was not even bad enough to take a painkiller.
The rest I always had during flareups and when I was at my worst the flare did not stop, it went on and on and on.. I think the chestpain was caused by inflammed intercostal muscles and the nerves that serve them. My heart was racing like mad and stopped a few times only to fill up (I could feel that) and start beating again. My lower lung lobs did not work and the upper lobs only barely worked.