Breast Milk/Feeding Questions

Artisha • Baby Baby #1 7/6/06 💙 Baby Boy #2 7/8/19 💚

My plan was to formula feed my son but I wasn’t expecting my milk to come in with a vengeance (this is my second baby after 13 years- so I forgot) and I decided to pump to relieve the pain and pressure. It worked but now I have breast milk that I can’t bring myself to throw out.

Can I give my son my milk and still give him the formula to supplement? Can I give him BM at night and formula throughout the day? Will the combination of the two upset his little tummy? When and how often should I pump?

He is on Enfamil Gentlease btw.