Hmmm maybe that's why he took himself to hospital...
Seriously though The Queen and Philip are not from that generation where they need to be with each other every day for the other to know they love each other. We often hear that one is at BP or Windsor while the other is at Balmoral or Sandringham. Really it is no different from that in a lot of way.
To me the fact The Queen didn't visit him, as she has done in the past, shows it was not a massively concerning problem he had.
I'm sure Philip, known for his 'no fuss' approach would rather the Queen, for whom Royal Ascot is probably her favourite event, would be there having fun than sitting in a hospital room with him. Racing has always been more the Queen's passion than his.