Colostrum a day before missed period?

Good evening! So I breastfed my son for almost three years and he is four and a half years old now. Never leaked during or before periods in the past 1.5 years since drying up. Tomorrow I am due for my period, but am trying to conceive. Im trying not to read into every symptom, but last night after I got out of the shower I noticed those bumps on my nipple and clear fluid came out when I squeezed my nipple slightly (a drop or two). Tonight, same deal, and it’s yellow like colostrum! Anyone else have a few drops of colostrum come in BEFORE finding out they were pregnant or how about when they weren’t? So confused! Thank you!