Hi @rwinney, thanks for the response and video link. My doctors are not too forthcoming with investigations but I am being persistent. I believe I have sleep apnoea (my wife has recorded me sleeping) I am just awaiting the results from the sleep study. All of my family suffer with a form of autoimmune disease and I am sure I suffer the same, I am a young male so do not fit nicely into a category.
Having watched the video, I can relate to a lot of the points raised. The point of pushing and crashing is exactly what I do, if I ever stop grinding away I suffer quite badly. Also, I used to be very active attending the gym, playing football but now I am hesitant in doing so. This is because in part I am in pain and following exertion I tend to crash severely and the pain is heightened. These fears were exacerbated following the forming of the blood clot. I am also being treated for anxiety following a bump in the road as a result of pushing myself for an extended period of time. I am more resilient now but I do feel a little down just because of the chronic pain and not knowing the cause.

Thank you for taking the time to respond, I really appreciate it