Period ended and now cramping with brown discharge?

Idk i didnt get my period all of january it was due jan 25th but i got it feb. 1st and it lasted til like the 6th or sumthn like tht.. now its the 12th and i realized i am cramping like period cramps and i have sum brownish discharge?? shud i be worried? idk whats goin on this has nvr happened to me.