Yes, that is right
You don't sound whingy at all! I basically asked the same question that you asked here, to the twin group I am a part of, and so many people came back saying that I would be fine, that having 4 was no different than 3, that the hard work was done with the twins etc.
And to be honest - I didn't feel prepared at all for the shock of it all. I really believe that it would be no different. But for me personally - and I know everyone is different - I found it to be really bleeding hard.
I just wanted to say it is ok to feel that way, we are all different you know?