Sue, if it helps, I think you're perfectly normal

After over 7yrs TTC & 6 stim cycles of IVF, I'm in exactly the same position as you emotionally at 19 weeks.

We didn't buy anything for baby up until last week when we bought the cot & changetable... DH has put them together, but thats it so far - I've opened the door into what will be the nursery & I just keep thinking to myself, 'Are you serious?!'

I think the scars of a LTTTCer run deep - and I know its hard to get your head around.
My DS was conceived without any issues - I got secondary infertility due to complications with his birth.
I remember deciding to try for him, it happened straight away, I was pregnant & buying things as soon as AF didn't show up
I was blissfully ignorant to all of the things I know & have been through over the past 7-8yrs.

People are saying to me surely you're starting to be confident now that you've had a couple of scans, your tummy is growing & your baby is moving.... erm no, actually - it just feels like I'm getting fat & any day I'm expecting to wake up to the reality of what the last 7yrs has been about.
Perhaps when I'm holding my baby in my arms & actually taking it home with me from hospital it might start to sink in..... maybe

Somebody asked me also if we try again for more after this one, will it be any easier... no, I don't think so either.
I have a little more faith in the science now (of assisted conception) - but I don't think I'll be any more confident for me personally even if we did another 10 cycles with another 10 positive results

The scars of a long timer run deep I think.... so I think you're perfectly normal

Although as soon as you move house, I'd be spending up big on baby, because that last trimester will fly by

Best of luck & congratulations on your pregnancy xxxxx