puerperal blood(or period)

i had a miscarriage on Sept after 1-2 months pregnant. actually i didn't realized that i was pregnant back then, i just thought that my period was late and didn't take any pregnancy test. i continued to consume some pills and i think that's why i had a miscarriage. Now I've been bled since 23 sept until now. is the puerperal blood are usually take this long?