Period at 7 weeks postpartum?

Asmom

I’ve been bleeding and my daughters 7 weeks old; some days it’s spotting and some days it’s heavier, it’s accompanied by pain in my stomach (I guess cramps) and migraines (which could be also be from my fibro). I’ve been EBF on demand and she’s slept through the night since birth (up to 5 hours only one time 6, usually 4) I was told that I wouldn’t have my period until I wean her and that wasn’t happening for awhile. Has anyone else experienced this? Is my period coming back already, If so for what reason?