Breast milk for pregnancy test

Haha alright ladies, first let me start by saying I think it’s super funny and thought hell, why not, let’s just see!! So I’ve heard that women express their breast milk and then they use that to do a dip pregnancy test to see if they’re pregnant, the theory is that hcg is in your milk and shows up sooner than urine does. So completely for fun and just to see what happened...I took a urine test and did one with bm. The urine one is negative. The bm one has a very very faint line!! Now, I’m not saying I’m pregnant but thought I’d throw this out there and I’ll keep urine testing or update when I start my period.