I had this same thing happen last year to my 2000g normal female. Laid 5 eggs and retained one. I read all sorts of stuff and decided that after a week of it being stuck in there, to aspirate. I drained a whole bunch of the egg out of there and it looked much better instantly because it wasnt such a bulge in her. 2 weeks later we saw this:
'twas really gross but it came out all on its own. My girl started to eat before it came out so I don't know if poo helped it come out or what. But I do know she pooed the same time that the egg came out. Hang in there man. I'm sure it will be fine.