I had two flats this weekend and am left wondering whether I should replace my tires. I have about 1,500 miles on them.

I am proud that I fixed the first flat completely on my own! (Took me about 45 minutes, but I still did it! ) I don't know what caused it, but it was my first flat in 1,500 miles, so it was probably time. Then, on my next ride, I noticed a slow leak. On that one, I found the cause: a thorn in my tire that had clearly punctured both tire and tube. But because I had already used my spare tube replacing the first flat, I couldn't fix it. So I made the call of shame and my dear BF picked me up. (And then cooked me a delicious dinner of smoked scallops over a bed of spinach with a citrus vinaigrette and corn on the cob. YUM!)

So my question is, when I go to my LBS to pick up some new tubes, should I also see about replacing the tires?

Your collective wisdom is much appreciated.