sounds like you have 48 hrs left. have a cuppa and relaxAhhh okay, thank you very much!
Just now I went and managed to shine my torch through the egg without moving it from the incubator; the air cell looks fairly large and is on a steep angle, and there is quite a lot of shadowing on the far side of the egg/air cell (the part facing down towards the towel) and a strong bumpy movement there. Maybe that means it is trying to break through into the air cell? I hope so!
I am trying not to get too anxious because of the low temperatures, I just hope it pips at least internally in the next day or so! I'm very happy to at least see that there is movement inside in the shadowed area.