Anyone using BF as contraception?

I’m wondering how it works! I’ve read a lot on it but I don’t feel like anything’s straight forward with breastfeeding😩🤣 it’s like “you can do this but you can’t”🤣 I ebf my little boy who’s now 18 month old I fell pregnant with my little girl when my little boy was 7 months old and I read that it can be used as a form of contraception up untill 6 months! I did not know this hense the reason I fell pregnant 7 months pp🙄🤣 my periods returned very soon after giving birth both times so does this mean I’m out from using it as contraception? I don’t believe in the pill, implant coil etc as I don’t want to pump my body with artificial hormones, each to their own though it’s not a dig against people using it I just chose not to so I track my ovulation. I started doing this last month after my first period after having my little girl but I didn’t have one positive ovulation test but had a period again this month.