I think you’re making things up in your head. There is nothing wrong with Kate.
Most articles put the likelihood of Kate giving birth in late April. Even Meghan’s friend Lainey mentions today Kate giving birth in late April.
If I was going to harbor a guess of when Kate is going to give birth–which is something I’m not really interested in–then I would guess between 0900 on 22 April and 0900 on 24 April.