I grew up in Africa and used to be afraid at night, because there not only do they break in to steal what you have, they murder you on their way out as a rule.
Then I moved here and although I always heard noises outside I tried never to give them too much thought.
Until DS came home the other day and informed me that someone had chalked an arrow on our house number. 
It coincided with having a knock on the door the day before from some people claiming they were there to talk about energy price rises and could move me over to British Gas straight away if I wanted. They claimed they were from “money expert” which I’m guessing is a rip-off of “Moneysavingexpert” to make them look credible. Coincidence quite possibly, but it’s hard not to over-think.
The police are actually taking it extremely seriously and are coming round tomorrow as I have a disability, have no local support, and am predominantly in the house on my own.
I have bought. Ring doorbell so I don’t have to open the door to anyone, I lock all doors at night, and I have a dog who barks and whose bark would be enough to hopefully deter anyone from breaking in.
It’s worth remembering that an intruder isn’t going to know whether your dog is aggressive or not, the bark will be sufficient.
Am I scared? Bloody right I am. But I have to continue to live here so it is what it is.
Personally I wonder why anyone would want to break into a row of terraced houses when they could break into the ones up the road which are massive and worth £££, but who knows.