Good job you and your stuff is ok...
My nan once let a man in who wanted to use the toilet whilst his friend kept her talking outside... The didn't know I was on the computer upstairs, and when I saw the bloke I asked who he was and he said he was a relative (I knew he wasn't because we have a very close family) and had heard about these occurances... Luckily I carry a locking flick pen knife so I told him to leave before I put him in a hospital... They went, but my nan was a little shaken.
Worst thing is, they came back two weeks later and tried to force in, again, I was there visiting which was lucky... I never let them know I was there until he had broken in and came through the living room door - I punched him as hard as I could and dragged him out. His friend just ran off when he saw me drag him out of the house... I had to give a statement to the police but got away with it because the two men were known for doing this in another part of Birmingham...
Makes me sick that they would attempt it twice, especially to an elderly lady who they assumed to be on her own... They havn't been back since so I'm presuming they have either left the area or have been jailed... I just make sure I go around my nan's regulary...
Just keep aware and as said by others - don't let anyone in unless you are 500% sure. You can not trust anyone anymore... I guess it's just the world we live in now though...