spotting

[cell-here.livejournal.com]

my last period was dec 13th 2006. my average cycle length is 34 days and its pretty much regular. my period is not due until january 16, 2007.
i've never spotted before but since my last period, i've had light spotting like 3 different times:
once in the middle of my cycle, another time a week after that and then again yesterday.
it lasts for like 1 or 2 days.
it hasn't happened to me before so is this normal? is it a sign of something bad? pregnancy, stress or something more serious?
thanks in advance.