Are your chocolate eggs supposed to disappear when you get the trophy? I'm trying to decide if I've been bug-bitten or if this is supposed to happen... (If it's supposed to happen, I'm a bit disappointed. It takes a lot of effort to get those!)
Even if you don't play again this weekend, you'll probably be able to get spares from friends to make up the ones you are missing. Other people will have multiples - even if they don't put any further time into it, most players will not get the trophy with no eggs left over. I did, actually - I was horrified to lose my entire collection! But now I know it's possible to find more. ;)