Brilliant to hear from you, welcome back @parkrunmark 
You’ve been through a great deal, I hope you’re able to rest and recover your strength. I can imagine the thought of weaning off medications and possible GvHD is quite anxiety inducing, remember we’re here and so is your treatment team if you’re feeling worried. There is another thread about recovery post transplant you might find reassuring with lots of advice and stories, you can take a read here; When can enjoying life begin
Wishing you all best Mark, and I hope your results on Tuesday are reassuring.