Welcome to GF. Sometimes it takes the gecko awhile to start eating again after laying. It doesn't hurt to hold her and see if you can poke a feeder gently at her mouth to see if she'll eat it. I have had a few leopard geckos that lost a lot of weight during breeding season and never really gained it back. Needless to say, they had to be retired as breeders. On rare occasions a gecko that may have a lurking disease can get sicker due to the stress of laying. 45 grams is a bit small for breeding.