19 yr/old Canadian Barred from Us!? HELP PLEASE!!!!

Hello In 2007 I was 14 years old and I came to The US, legally, with my father. I believe I entered on my fathers L2 (business) Visa. While in the states I lived with my fathers wife, who was also Canadian. He moved back to Canada In 2009. I lived there for 5 years until I was 19, 2011. The L2 Visa expired some time during the summer of 2010, when I was 18. Keep In Mind when you are a 14 year old you don't think to ask questions pertaining to immigration status and all that stuff. So as the years went on I assumed all was well and had no reason worry. I did not know anything about my visa or about unlawful presence and being barred...etc. All I knew is that my father brought me to Georgia to live. The rest was never explained to me. It Was not until I began to inquire about obtaining a social security number to apply for scholarships for college that I began to understand the unlawful presence consequences and what type of visa I entered the county with. By then I was to late had already overstayed my visa by a year. I am a Canadian. My questions are: how do I find out if I have been barred officially? are there any actions I can take to gain re entry/ a waiver if I have been barred? since I was underage when I came and did not know of or about anything pertaining to visa's ( children typically trust their parents with that stuff.) It seems unreasonable to assume I would know. Canadians be banned at all? does anyone know anything about children entering with L2 visa and overstaying? I know its pretty specific. Please help? Im not sure