BREASTFEEDING HELP

Malina • Super mom to Dawson&Tinley Angle mom to 5 beautiful babies Rainbow baby due September 2019

Ok so I breastfed my son till he was 13 months old and also breastfed my daughter till 13 months. Hes now 4 and shes 2. I'm pregnant 19 weeks to be exact and I've ALWAYS still had milk in my boobs if I squeezed them. I noticed when I squeeze them nothing is coming out? I dont remember this happening before. Should I be worried or does this mean my boobs are just getting ready for new baby??