Heavy flow is horrible. Something that doesn't induce heave menstrual flow.

I got the depo shot and I'm still able to breast feed. in fact I leak a whole lot more.

I think a hormonal BC is the only type that helps with that....

I wanted to get on something without hormones. @dcb012 I just can't get on anything that makes me have a heavier flow because I have such a heavy one already.

Get the copper implant

The only thing that can 100% not affect it is a non Hormonal IUD. All the other ones have a risk of it. If you EXCLUSIVELY breastfeed with ZERO substitution ever, the mini pill can be a semi okay option but again has hormones and limited birth control protection.... No matter what you get on always be safe unless you're ready and planned for another. I know multiple people that had no cycle while nursing and assumed they were fine and ended up pregnant with a 3 month old....