Will I Gain Weight After Novasure Ablation Procedure?

Hi, I am scheduled to have novasure ablation done in a couple of weeks. I was really excited about having it done. I have heavy bleeding but the main problem is severe pain that causes me to miss work every month. I have just come across several message boards today. Almost all the women are saying they are gaining weight after the procedure. The majority becing 20 lbs. I am really concerned about this. I struggle with my weight and do not want to gain more. Is this a very common side effect? I hadn't heard anything about weight gain until today.