Enforcement Board Experience?

Hello everyone. I am in the process of endorsing my Oklahoma RN license to Texas. I filled out the online application and when I reached the part where it asked about criminal history I selected no. I did have an arrest, over 10 years ago, when I was 19 years old. However, as I was under the impression that it was a class C misdemeanor, I did not report it, as it stated Class C traffic violations didn't need to be reported. I was pulled over for speeding and incorrect lane change, both traffic violations. The police officer said he had the option to arrest me for reckless driving since I committed two violations in one and he did just that. I spent the weekend in jail since it was a Friday and saw the judge on Monday. I did not have the money for an attorney so I went ahead and chose deferred adjudication, paid a fine, was on probation for 90 days, completed all of my probation and was put the incident behind me. Being older and wiser, I would have chose to hire an attorney, but live and learn. Long story short, on my background check the arrest came back and my endorsement license cannot be processed until I send documentation of the arrest. My question is, will they complete my review in the first 45 days or do you think they will push it to the enforcement division which is 4 to 6 months minimum review time. I'm afraid since I did not disclose the arrest that I will be denied a license. I was under the impression this was a class C misdemeanor when in fact, it was a Class B misdemeanor. I have never actually look to any paperwork from the arrest since it was so long ago so I was unaware it was a class B until my initial endorsement application letter was sent back saying they could not process it because of the arrest. I have not been arrested since nor have I even had as much as a speeding ticket. Do you think this is going to be a major issue? I am worried that since I didn't disclose it in the beginning, but I was under the impression it was a classy and did not have to be disclosed. Any thoughts or personal experiences are appreciated. Thank you.