Low supply because baby is sleeping through the night 😩

I've been so excited that my baby is finally sleeping through the night at 10 weeks old. This comes with much more welcomed sleep for me! Unfortunately I just noticed my supply has gone down since I'm going longer periods in between feedings. What can I do to increase milk supply? Have I damaged my supply permanently? I go back to work in a few days and need my supply to be strong to keep him well fed.