On July 17th, 2013 I went to my immigration interview with my dad who is a US citizen, Im 21 now but when he filled my i-485 (adjustment of status) I was 20 so I was under the under 21 immediate relative category, the interview went well and I was approved, but they havent update the status on the internet, It still says that Im on the interview process, I was wondering how long does it take to get the green card in the mail, after being approve ? Please let me know I have 10 years on this country and I would like to visit my country next month 
thanks
thanks