There’s no reason for shame. Assuming you are working for an ethical organization that keeps its overhead at a reasonable level and that you are carrying out a worthwhile mission, you matter. Imagine all that would not be getting done if organizations that aren’t the largest charities shut their doors tomorrow. The results would, in many cases, be calamitous.
But being smaller is no excuse for not making a heroic effort; your mission deserves smart fundraising. And smart fundraising means taking advantage of these big opportunities.