Help finding whether I can undo an adoption after 1 year and 3 months!!.

During senior year of high school, I had trouble filling out college application due to my parents illegal status in the country. I'm a US citizen but i struggled filling out the Affidavits when applying for in-state of schools in my own state (florida).We got no advice whatsoever from my cap counselor or from representative at FSU. One thing led to another and we decided to let my older sister adopt me. We thought this was the best solution for me but soon we discover it had major affecting circumstances. Not only do my parents lose any chance of me claiming them for residency later on in the future. I'm also affect because my sister and her husband make about 5 times what my parents salary is. So I get no type of financial help as I would under my parents. I actually had no choice financially and had to attend my local CC. So now we would like to reverse the adoption mainly because we were pushed into thinking it was my only solution. (I live in FL with parents & Sister lives in CT)