Why am I so happy?

(this should have posted a few days ago)
Last week I did something I haven't done in a long time. I baked a cake, from scratch. Two of them in fact. It made my family happy. I gave one to a friend. It made her happy also. A few days later I made more for my church.
Hmm... not sure this is a common emotion right now but I feel really good emotionally. I am relieved. Happy. At peace. It is one week before D-day. DBS day that is. In just 7 days I will be trying on of those snazzy metal 'halos' I've heard so much about. 7 more days of driving privileges. 7 more days of hair! Looking foreword to the photos after that is done! 7 freakin' days left of unscarred skin! Solomente 7! Adios mio!
Shouldn't I be nervous? Scared? Down on my knees praying hard? What gives? Why am I thinking clearer than I have in a long time? Why am I suddenly able to work on projects that were insurmountable the month before? Could I be experiencing the "honeymoon effect" of a new treatment, before I've even received it? Need to look into this more...