So what am I supposed to make of this?

It's been a week since my bf and i split. no contact at all, i'm not over it but it's whatev er. so im going for a run today and i see this car kinda drive a little slow by me, but not in a stalkerish way, just a little bit slower than the normal speed. the people in the car kept looking at me and im looking back thinking who is that? and all of a sudden i realized it was my ex's family, and they were staring at me and about to roll down the window. his brother was there too. what does this mean?? is this something i shouldnt overthink? they know were broken up & not talking