Nursing 2 month baby. Milk supply drop after being sick (stomach flue) 3 days ago. Eating, drinking well. Pumping and nursing a lot. Keep decreasing. Worry?

BF. Drink a lot of fluids. It is common for the milk supply to diminish when your body is dehydrated, from a stomach virus. Should restore itself in a few days. Be sure to drink excessively and have the baby nurse often.
Milk supply. No need to worry yet. Make sure you increase your fluid intake. Since having "stomach flu" a few days ago its very likely you got dehydrated. Avoid medications that will decrease your milk supply. Hope this helps.