Adjustment of Status - I-485

Me and my wife had our interview on 27th of June 2017. After 48 days on 17th of August Immigration came to our house. Our interview was fine the IO told us that we should go that if he need more papers he will send mail to us. We came back, I met some of my friends and discussed it with them they said my Green card will come that that is what they use to tell people. But we were astonish that on the 48 day of our interview 2 white people came to our house. One man and one lady. They came by 7:35am and first met my step son and told him they are looking for me and my wife. My step son came and nock to our room door said 2 white people said they are looking for us. My wife told me it could be Jehovah witness people I went to see them. On my opening door I saw the man and a lady they said that they are from Immigration. The man ask me can they come in I said yes. No place in our house they did not entered. The lady was snapping and recording. In fact, is a long story. Though I thought that immediately they leave the next we they will send my card, but it's unfortunate that uptill now they have not send my green card. I am very worried because me and my wife want to travel. I called today the lady I got on phone told me that I still have 30 days processing timeline. Please my brothers and sisters in this situation I need your advice and ideas. Meanwhile, I came to United States with G4 Visa. Please what do you think that is the problem and why after they went back up til now they have not approved my green card and send it to me. What do you think please.