why do overcards scare me?

[insyder19]

Okay, I was really wondering why it happens. But it happens more often if I just lot a pot or two.

I have pocket tens, I raise, one caller, flop is 742 rainbow or not. I bet he calls. Now a JACK comes on the turn and it automaticly slows my action down. Like he could have had AJ or whatever and hit this jack.

It doesn't actually matter if a jack comes or not, it could be a Q/K/A. The A would scare me the most however.

Is there someone else who has the same experience.

MOST OF THE TIME, they didn't hit this overcard, but I am missing value there because I don't bet enough.