Asaph said that God did marvelous things for Israel in Egypt (Psalm 78:12).
He also did marvelous things after they left Egypt, dividing the waters of the Red Sea, guiding them by a cloud during the day and by fire during the night, splitting rocks in the wilderness for drinking water as abundant as a river (Psalm 78:13-16).
God does whatever is needed to fill the needs of His people. Do you believe He has done that in your life? Do you believe He will continue to fill your needs?
If so, why worry?