I had that happen earlier this year for my first time... A nice Pastel female bred to a Pastel Ivory! She started nesting and then went back into shed again... I thought that was weird but didnt think much of it... Then she dropped one slug and had what looked like 2 big lumps of maybe 3 eggs apeice...
She had 2 giant eggs surgically removed maybe a month and a half after she should have dropped them. She is doing fine, but I was getting pretty bummed out when she looked so uncomfortable! Now she just has a bunch of stitches!