Syd everything you're thinking and feeling is 100% normal, I was the same when I got my BFP's I had finally allowed myself to picture the future with a baby in it, before I got the BFP's I knew I really wanted a baby but when I got my BFP I realized just how big the want was, so when it was taken away it's very hard to accept or to understand why.
I believe that the spirit of those who have passed stay around you to look after you, maybe the little baby in business class was a way to let you know that your angel is near by.
Look after yourself and when you are in the UK I would share what you're going through with a trustworthy friend so that they can give you support xxxx