My website is not indexing new posts

Hello.

I have a brand new site (40/50 days old) and all the posts until now have been indexed. But the last 2 of them are not indexed and I already used the "fetch as google" and nothing happens.

It has passed 3 days, but the fetch as google usually is ultra fast indexing this. Is this something should be str worrying about?

I know you all will say that it is too soon, but the last posts were really fast to index. If it is something wrong, what can it be?