First, congrats on the two month old! They start to get really fun around now. Yes, your milk supply can improve. Your body makes what it thinks the baby needs. If you can, try to nurse on-demand as much as possible. When you are away from your baby, pump every three hours. Hang in there!
Just remember, every drop of breastmilk she gets is good for her! Also, remeber that you are a good mother no matter what your milk supply is like!