Many mints look alike. What does your smell like when you crush a leaf? If it's real minty it may be spearmint -a hint of chocolate, Chocolate mint. Maybe it has an orange scent, orange mint might be what you have. The most common is spearmint, grows low in the ground (can be invasive), stems are a dark redish green, leaves dark green with that wondeful deep mint flavor and aroma.
I love mint. I grow it in containers so it doesn't take over my yard. I grow chocolate, apple, pineapple and orange.