- depo shot , 2 week long spotting

An
So I got the depo shot February 10th I got sick that weekend , high fever , chills , body aches . So I conquered that . 
Then I was suppose to get my "February's" period a week later of the 10th , never got an actual period, but  I did get spotting this month on march 11 . 
Til this day I still am spotting and it's been almost 2 weeks ! 
Is that bad ! ? This is my first time on the depo shot . 
I'm worried cause it's been so long I've bee spotting and it's brown blood . Not red red .