I just got my hair highlighted with a carmel color and it turned out too blonde. Is there any way to darken the highlights or my hair?

A salon could sort that out for you easily by just toning doen the blonde in you highlights and not touching the rest of yor hair. If you wanted to do it yourself you could try a highlighting kit in a darker blonde than the highlights are now. The same thing happened to me a couple of years ago, I went back to the salon and explained I was unhappy because the highlights had come out lighter than I had wanted. The fixed it for me with no extra charge.

It will fade and I'm sure you will be happy with the color in a week or so. You can also try a temporary color, like Roux Fanci-Ful rinse.