So I used to have the same problem until recently. The way to get over it is to pay attention to how you feel every time you hear these noises and to train yourself in to feeling that the noise isn't really a big deal (you could even take this further and start to have positive associations with the noise - it's the sounds of your home, where you are most comfortable). I used to wake up to every little thing, now I live next door to a fire station with sirens blaring every hour, and a major construction project going on next door and it doesn't bother me at all.