Birth Control or my period?

I don’t know if anyone else can relate, but I just got out on mirena and I have no idea if I’m on my period now or if I’m just bleeding due to the birth control. I also had a baby 2 1/2 months ago I’m sure my body is very confused. My period’s have been irregular so I really have no clue. Did anyone else get Mirena and have bleeding as a side effect?