I have so many friends who run that tell me their feet hurt, they get blisters, etc. I’m no expert, but my first question is always, “Have you had your gait analyzed?” Usually the answer is no. If you’re a runner, especially if you’re just starting out, it’s worth it to get shoes that fit.
(Second question, just for the record, “What socks are you wearing?”)
Head to your nearest running store (I’m not talking Foot Locker here), and ask them to analyze your gait. They will. Then they’ll pull some shoes that will work for your running style and your feet. You can try on to your heart’s content. Truly, they will help you find a pair that works for you. I’ve done this at several different places, and all of them worked hard to find me a shoe that fit. I have weird feet and knees, so this isn’t always easy.
And, of course, when you find a pair you love, the shoe company will stop that specific model and come out with a new one. They’ll claim it’s the same shoe, but it won’t always fit the same. Go back to the store!