Thank you for the information and your question and I am sorry to read about your situation. First, it is important to note that, Oklahoma, like most states, is an employment "at will" state. That means that an employer may terminate an employee for any, or no, reason and with no notice or warning unless doing so would violate a contract or is motivated by the employee's race, national origin, gender, age (over 40), disability, religion, pregnancy, or military service. So, unless there is evidence that your situation falls into one of the exceptions I mentioned, you would not have legal recourse for your termination.
You have indirectly implied that because you are a women you were terminated when others have not been for the same or similar errors. You can certainly file a complaint with the EEOC if you feel that way and let them investigate the allegations and try to resolve them, but they will have to find something more than the fact that you are a woman since there was apparently a significant error in your work. In other words, they will have to discover either a pattern of treating women more adversely or direct statements about female employees that would indicate that women are being treated, as a pattern, more adversely at this Company in order for them to find discrimination. Or, they would have to find that exact same error committed by a male colleague with the same experience and tenure as you who was not terminated. But again, you can file a complaint and see where it goes.
Please feel free to ask for clarification if needed. If none is needed, then if you could take a moment to leave a positive rating in the ratings box above, I will receive credit for assisting you today. Thank you