It's not selfish. It's perfectly understandable. You've become used to a particular lifestyle and you see no reason for it not to continue because you haven't planned it any other way. Then something comes along that throws all your plans to the wind and you suddenly have to make big changes.
It's a bit like when someone, say, is crippled or brain damaged in an accident, or suddenly loses or has to change their job. They suddenly have to contemplate a completely new lifestyle that they hadn't foreseen. But they cope with the changes and, over time, everything falls into place.
Incidentally, we had a similar scare some years ago. Like you, I was just late. I already had two teenagers and was looking forward to university. I wondered how I would cope and what would become of my plans, but I guess I would have just got on with it 'with good grace'. I think maybe you would have done too.