37 breastfeeding 2year old periods still all over the place

Sj

I'm 37 years old and still breastfeeding my 2year old. my periods have been all out. I will only bleed for 4 to 5 days with the first day heavy, then the others light to barley anything .so my question is, is it normal for breastfeeding to make periods like this, or could it be start of something and how easy would it be to conceive again