4 months of waiting for GC after interview

[Vicky12 0]

So my husband (US citizen) and I were applying for a Green Card for me. We sent all the documents on October 30, got the interview notice on December 26 and finally had an interview on January 29th in Pittsburgh PA office that went good, and we were told to wait 1-2 weeks for a Green Card. It’s been more than 4 months now, as we never got and never heard anything back. At the USCIS website my status hasn’t updated since October 2017(when we just filed documents). I went for Infopass appointment 2 months ago, where they told me they had some kind of mistake in the system or so, and now everything fixed so it’s just another 1-2 weeks and I have to get everything. But nothing yet. Here’s another thing - my friend had the same interview in the same office just a month before me and she got her Green Card in 2 weeks as they said. So it’s definitely something wrong going on. Should I schedule an another Infopass appointment or it doesn’t make sense and just to wait as they told me? Thank you guys🙏🏻