Don't sweat it...
Another star colliding with our Sun would be spotted approaching about a million years before it got here. Don't max out your credit cards just yet.
Do you worry about normal things, like clogged arteries or being hit by a bus? Wait until you're 50. You'll be on the Lipitor and aspirin. The good news is, if you've gotten to 50, you're probably too careful to be easily hit by a bus.