Breast milk changes?

Okay, so I have a 26 month old but he self weaned at 14 months. Well (no judgement) my fiance thinks it's hot to drink my milk from me, so I never fully stopped producing, but we've been TTC for this entire month and BD everyday during my fertile period, and pretty much every other day too (he's hot okay 😍😍) now Its 8 days before my period and my milk has been more difficult to come out and when I self expressed some yesterday it was yellow again! It's been milky white for at least a year now and all of a sudden it's turning yellow! Could this mean pregnancy? Is it normal? Should I be concerned? What are your thoughts ladies?