Parts of shrinking me

So I vacillate between thrilled, scared and quietly determined.  I have now lost 6kg in 5.5 weeks.  I have never done anything like this before.  Previously I had set myself the goal of 1kg per month, and failed at that.  Now I am steadily cracking 1kg per week.
My shrinking self is subdivided into lots of paradoxically diverse parts.  Part of me doesn't believe its really true (I was starting to believe I would just be chubby forever).
Part of me is so f-ing loudly proud of myself.
Part of me is quietly self satisfied.
Part of me is utterly focused and determined to move mountains (literally).
Part of me is slightly terrified at the reality of actually achieving this previously unfathomable goal (12kg in 12 weeks).  What will it mean for me if I actually do this?  Will I mean I need to stop limiting myself?  That I need to start living up to the knowledge that I can actually do things when I set my mind to them?  (many of my dear friends would say that they had known this all along and point to my list of achievements, but I tend to focus more on the things I haven't done and form my self-image around them... then again, my to do list has well over 100 things on it so I accept that I may not have realism as one of my strengths... then again I do believe in setting the bar high and surprising yourself... I mean, look at me now... and thus ends a ridiculously long set of bracketed ramblings).
Part of me is tempted to self sabotage (to get back to what I was actually saying)
Part of me is confident that this time I am really changing, both mentally and physically, and I want to hold on to it so hard that my knuckles turn white.
Part of me is well, slightly numb.
Another part is kind of hungry, but it is lunchtime.