I am uncertain as to the specific laws in Oklahoma, but it
is possible to reverse an adoption. Depending on the state you live in, the petition may be filed by the adoptee or the biological or adoptive parents. However, it is a lengthy and expensive process. You will have to check with the courts in your location for information on whether or not it is even possible to reverse adoption in your home state. Furthermore, you will almost certainly need a lawyer.
You must convince the court that you have a compelling reason for your request to reverse the adoption and, even then, the court may deny your request. It is the court's duty to decide whether or not the reversal would be in your best interest and, even if you disagree, they may decide that your adoption is in your best interest.
If your were adopted through foster care, then your birth parent's rights have been terminated; if you manage to reverse the adoption in that case you'll go back into foster care, and will
almost certainly not go back with your birth parents.