Hey Jewel
Wow a month after having a baby-GO YOU!!!!
This article can help you out https://www.breastfeeding.asn.au/bfinfo/exercise-and-breastfeeding
Some things you might like to consider is breastfeeding burns approx 500 calories a day so you may like to consider your calorie intake. So if you are having normal calorie intake + burning calories breastfeeding and then on top of that burning calories running you may find your calorie intake deficient for your energy needs.
If you're in Aus ABA can help if in USA etc La Leche league may have some more info for you as well.
Hope this helps