Your washing machine is a thirsty beast. Wash full loads. I know you want to wear that one shirt tomorrow. But a half-load uses the same water as a full one. That’s just physics being mean. So, wait. Sock up. Wear the same jeans twice. You’ll survive.
Also, check your machine’s settings. Use the “light” or “eco” cycle. It uses less water and less energy. You won’t even notice the difference. Your clothes will be clean. Your water bill will be happy. It’s a win-win.