Mr/Ms: Njamame: I can’t really tell you whether you need to file Nunc Pro Tunc or not, but the process is not that bad. It is a delay though. Now, if you have applied for I-485 and it is still pending, and you need to do NPT USCIS will not deny your application, but they will transfer it to local asylum office. If everything is ok, the asylum office will grant your NTP. Then you will need to forward your NTP approval to USCIS so that they can resume processing your I-485.
My case if you follow my time line, my Nunc Pron Tunc was approved, I sent my approval of NPT to Nebraska, they told me that they are processing my I-485. I didn’t have to do it again.
Another note, if you really have the gut feeling that you need to file nunc pro tunc it is good idea to file it now. It is not big deal. I missed to do it earlier, and that is why I am still pending. If you do it now, the process will be faster.
Also if you marry, and you want your wife to derive from you deravitive asylum, that would be a new asylum. You won’t qualify for NPT. You will do asylum from a new…good luck..