To explain this, let me quote the former Anglican bishop of London, Mgr. Graham Leonard(?)--here he is speaking about ordaining former Anglican clergy, but this is equally pertinent to many converts:
We are talking about men who ... sincerely believed that they were following God's will as regards their vocation. Only later, and sometimes very painfully, have they come to the realisation that the ecclesial body in which they [were] did not enjoy the fulness of Christianity which subsists within the Catholic Church.So, that's the problem. You think you've done the right thing, you think you've gone to the right place, and then you realise, as if lightning has struck you, that you've knocked on the wrong door.
It's a very tough place for people to be in. It's okay when they don't realise, but once they have, as Msgr. Leonard notes, it becomes a very painful situation. I found this pain accelerated my own journey "across the Tiber". It took me almost two years to work out that the Anglican Communion was not, for me, the full expression of my faith, but once I had realised that, there was an almost frantic desire in me to "get to the right place". Think of it, if you will, as realising you're not only late for the birthday party, but also at the wrong end of the motorway.
I think the important lesson to be learned here, though, is that timing is essential and crucial. You cannot go at faith like a bull at a gate; you must instead learn to work at God's pace. Even when bogged down in the pain of feeling distant and separate from those you long to be with, you must have faith that time will bring about that which is so desired. If we run too fast, then our faith becomes shallow and only skin-deep. If, on the other hand, time is taken--even painful time--then that faith becomes ingrained, and a part of our everyday life. You cannot run before you can walk.