Looks like you have a noisy home.
Use some earplugs. I do that for years. For sleeping and for meditation too. In the morning i am a light sleeper and i wake up because of noises. So, earplugs will do the trick. You'll hear nothing. Well, you'll hear your breath louder but that's a plus.

As for losing concentration, it's not over. You can get back to it. Once i was performing WILD and i got to the vibration state. But my blanket was bothering me (was covering my mouth). So, i lost concentration but, very calmly i uncovered myself (curious that when i was doing this, i felt the vibrations all the way through) and then i got back to WILD. A successful one, because i then entered a beautiful dream.