Feeling guilty

The first night home my milk hadn't come in yet and my baby girl was screeming all night! So with me not understanding breast feeding, I fed her formula and let my milk supply dry up. Later on learning that if I waited one more day I would have been able to produce milk for her.  I feel so guilty I didn't wait one more day. I hate feeding her this foamy formula! I feel like breast milk would have been way healthier. Am I alone in this?