请编辑下列段落，使其更加流畅和易于理解。
提供当前的段落作为输入。
I went to the store I needed to buy bread and milk. When I arrived at the store, I realized that I forgot my wallet at home. I felt embarrassed and worried about how I would pay for the items. Thankfully, a kind stranger behind me in line offered to pay for my groceries, and I was grateful for their generosity.