You may have mistaken building for an ovulation. I'm not sure how many ovulations you've seen but many new breeders make this mistake. I did my first year breeding.
If you are sure it was an ovulation...
I had that happen twice and got slugs about a week after the second shed. I then had a female do it last year and was bummed that I'd get slugs again. I talked to several breeders I know and they had good clutches when this happened. About a week later I got a good clutch of eggs. I guess the first two may have been flukes. Good luck!
I never thought about possibly missing the ovy. This is only my second year breeding so it is possible that it was just building. At least I hope so. My first thought was all slugs so I guess time will tell. Thanks for the responses.