Jane Blush How Do I Kow Which Product Broke Me Out?

How do i kow which product broke me out? - jane blush

Recently, I've tried all these products at once:
-Clean and Clear Cleansing Foam Cleanser,
"Milk of Magnesia as a primer for my oily skin (miracle in a bottle)
Jane-Blush

I love all three products, but I've stopped at once, because one of them broke me. Breaks outs cease immediately. How do I know which one?