How can I find out if I was adopted?

Question:

How can I find out if I was adopted?

I am 22 years old and my youngest brother is like 38. I just find it odd. I have always been the black sheep. I am wondering how do I find out if I'm adopted? I mean they are still gonna be my parents regardless. I am just curious. I was online looking up my family tree and my brothers came up an ansestery.com but there was no record of me ever being born. I have seen my birth certificate but I recently found out that your original birth certificate can be hidden to where the adopted child will see a birth certificate with the adopted parents as the birth parents. I am just wondering about this. I live in NC. Thanks for any answers.

Best Answer - Chosen by Asker: Ask your parents.