Period or Lochia?

So i quit bleeding at about 2-3 weeks postpartum and just had yellow lochia from there. Last week I started getting brown lochia and now I have lots of bright red blood. I'm not sure if it's my period or lochia? I do have slight cramps so im thinking maybe it is my period seeing as how I'm 6 weeks postpartum but it's not really like how my periods used to be. has this happened to anyone else?