Today's blog is slightly different from the usual in that rather than talk about my fundraising antics, I'm going to talk about my health instead.
As some of you will already know, I've been suffering from lung problems for some time now after complaining about my chest at one of my leukaemia check-ups back in August.
Given my age, history and previous ability to run marathon after marathon, my consultant referred me to the lung specialists at the Hammersmith to run a few lung function tests which indicated that my lung capacity had dropped by more than a third.
A CT scan confirmed that my right lung had shrunk and that I had severe scarring and inflammation of the bronchioli in the top part of my lungs. However, it was unclear what was causing this damage and many possibilities were branded about including pulmonary fibrosis and tuberculosis.
Understandably, this came as a huge shock and was hard to get my head round given that just a few months earlier I'd completed a Pledgeit challenge of running more than 35 miles to visit my Granddad in hospital.
I was put on steroids to suppress my immune system and asked to attend lung function tests once a month to monitor my progress to see if there was any improvement. I also underwent a lung wash and bronchoscopy where they took tissue samples of my lung but were unable to find a definitive cause.
This was incredibly frustrating at the time and the uncertainty of not knowing what was wrong with me I found quite unsettling in a way that I had not experienced before - not even with the leukaemia.
Six months later, after a whole raft of further tests later including an overnight stay in hospital later and it appears that I have an extremely rare condition (less than 100 diagnosed cases to date) called Pleuroparenchymal fibroelastosis or PPFE which doctors believe was brought on as a result of my bone marrow transplant.
The worry of course is that this will not remain the case forever and what's certain is I cannot get back the capacity that I've already lost which is hard to take as it means I won't be able to do many of the things I used to take for granted like running marathons and playing football competitively.
Ultimately, these are things that I can live without but it's going to take some adjustment as sport has always been a large part of my life.
I'd also be lying if I said I wasn't worried that the condition isn't going to get worse in the long run. However, there simply hasn't been enough people who've been treated for this condition specifically to be clear what the future might hold and I cannot afford to let myself worry about it something that is unknown and have no power over.
Up for the challenge
With that in mind, I am going to press on with my 30 before challenge albeit with a few alterations. Much as I'd love to, I don't think the Berlin Marathon (I can barely run for 20 minutes at the moment) so I've replaced this Run to the Beat instead.
Climbing Klimanjaro also looks like something that might be beyond me at this stage but I haven't ruled that out altogether just yet and will replace with another challenge if necessary.
This whole period in what's been a pretty crazy life so far has made me more determined than ever to help beat blood cancer as it appears that all of these recent problems have been brought on by my leukaemia in one way or another.
To do this I need your support by signing up for the London Bikeathon and helping me with my 30 before 30 challenges in whatever way you can.
Share my story with friends and family, encourage people to follow me on twitter, find me other people called Andy Jacksons and, ultimately, dig deep and make a donation to help me reach my £30,000 fundraising target.