Congrats on your 9 years and doing well.
As far as your Vitamin D deficiency have you tried an injection? On August 17th the day before my revision to extend my CC and AL, Dr gave me an injection of vitamin D as he wanted to boost me for the upcoming stress. My D was around 35 at that time me and I had been taking 200k IU daily for the previous two years. At my next draw a month Later my D was at 67 and my last draw it was greater than 98 (don't know how high) so I have backed down tob150k IU most days and 100 for others.
The D injection really worked for me so if you haven't tried (probably have) it might be worth a shot... Pun intended.