CBD while breastfeeding?

I’m still a little over 2 months away from meeting my first little one, and am planning on breastfeeding. During my miscarriage earlier this year, I used CBD oil to help manage my symptoms post D&C and it worked wonderfully. My doctors office is horribly uninformed about it (had never heard of it before even though I’m in a state where medical marijuana is legal), so I’m looking for reliable studies or information on the relative safety of it during breastfeeding. Does anyone have any info either way - safe or unsafe? Thanks!!