Good for you Jimmylegs, congratulations!
I know how it feels to achieve a previous personal best. Went though about 6 hellish years with MS when it really made me feel proud to make 2 miles slow slow walking with lots of stops to let spasticity ease up.
To put that in perspective I was capable of cross-country mountain cycling a month before I was diagnosed and did tai chi, swimming and cycling 40km a week to and from work - so the loss of being able to really push my fitness levels bothered me a lot. A lot of my perceived quality of life depends on my ability to exercise - most unfortunate in a pw MS
Bizzarely I am now somewhat back to what I was 9 years ago, able to go to the gym and do 2,000m in 10 mins on the rowing machine etc. I won't be winning any medals but my feeling of happiness each time I go is amazing. I just feel so alive and so thrilled I have another day of being able to exercise again.
Congrats again, and enjoy that feeling!