I think you owe it to yourself, your wife, your marriage, to consult with an immigration attorney about the situation. Many immigration attorneys offer free or reasonably priced consultations. You could meet face-to-face with an attorney, discuss your situation in detail, and get a professional opinion on how best to proceed. You could search for a lawyer near you using Avvo, or http://www.ailalawyer.com/
You may marry your sweetheart in Turkey without any negative effect on your own immigration status. If you are eligible to apply for US Citizenship, then you might consider doing so as soon as possible, because the time it takes for you to help your future husband to enter the USA as a permanent resident will be reduced significantly if you are a US Citizen, as opposed to a permanent resident. I suggest that you consult with an immigration attorney about all of the issues involved.
If you read Form I-864 on Page 8, it explains clearly that the I-864 is a binding contract if, and only if, the intending immigrant becomes a permanent resident.
Because you have withdrawn the I-485, the intending immigrant is NOT becoming a U.S. Citizen. Therefore, the I-864 contract is null and void. You don't need to withdraw it, because it's rendered void by the withdrawal of the I-485.
You stated that you are a self-petitioner. It would be helpful to know exactly what kind of self-petitioner you are. Did you file as the abused spouse of a US Citizen or Lawful Permanent Resident, using form I-360?
You should consult with an immigration attorney about your case. Perhaps you might find a nonprofit agency near you that might provide you with some assistance and low or no cost. Good luck.
You stated that you sent a copy of your naturalization certificate. Did you send that along with the I-130? If you did, then USCIS will probably be able to figure out the necessary information about your US Citizenship status.
I would need to know more information about your father's situation. For example, did your father ever become a permanent resident (did he ever have a green card)? I would like to see all documents and learn more information before being able to determine whether or not your father will be able to return to the United States.
For your first master calendar hearing, and often for your second (and sometimes for your third), you may ask the judge for more time so that you can find a lawyer. If, instead, you tell the judge that you are ready to go forward by yourself, then you will need to answer the allegations and the charges on the Notice to Appear. You might not know it, but the questions and the answers are not always so easy or so innocent as they might seem. By answering those questions yourself, you run the...
When did you file the I-751? You should have the receipt for the I-751, which indicates that your status as permanent resident is extended for one year from the date of the receipt. BEFORE you travel, you should consult with an experienced immigration attorney (if you have not already hired one) and go over your case to determine the issues and risks involved in traveling outside the United States at this time.