what's wrong to me?

sigh, grow until so old liao still fell down...
n fell down from stairs in front of other colleagues, still want to 'act style' and
saying myself was alright. (actually im felt very pain ,and trembling at that time)
Right knee is bleeding, left calf is blue green.
start from this morning, dropped my phone and car keys for several times today.
what happened to me jer?
:(

(p/s: by the way, im still able to wrote this in my blog. this proved that im not dying yet.Therefore,no need to worry me so much.)
Falling down is just letting yourself to wake up/raise once again!
Ushh! Kambateh!