Baby gassy from my breast milk...

Josalyn
Anyone else have an issue with their baby taking their breast milk?  I have been formula supplementing and have gone through four different formulas. We are now on Gerber Soothe and that helped. I stopped giving her breast milk and she did amazingly better last week. Thursday and Friday she has a little breast milk to ease her back into it. Yesterday she was super gassy and constipated. So I have pin pointed my milk as the gas culprit, now to figure out the spitting up constantly