I had to have 4 scans with my 2nd baby for growth reasons. My 1st baby (DD) was 2 weeks early due to me having symptoms of pre eclampsia, I was induced and she was 5lb 10 - not THAT small but for my 2nd baby they wanted to scan me throughout to check the growth.
At my last scan at 34 weeks I was scanned FOUR times (in 4 different rooms!) and eventually scanned by consultant who informed me that baby had ventriculomegaly. She explained it meant the babies brain was swollen, in my case just on the right side, it was bigger than the left by 3cm.
As you can imagine this caused some panic and I was sent the next day to a consultant at another hospital who were more specialised (again causing panic!).
To cut a long story short, we had more scans over the next 6 weeks (it was a LONG 6 weeks) before our baby arrived to see if the swelling had increased or changed in any way.
Our gorgeous son arrived safe and well last April. He gave us no cause for concern and is now a happy, healthy and very clever 8 month old. We came to the conclusion that the "swelling" is a bit of genius in his brain cos he's so clever and advanced (he has 2 teeth already
Have you been booked in for more scans? Have they explained that the swelling can fluctuate, ie increase or decrease from one day to another?? Our boy had a head scan when he was 6 weeks old and there was "nothing" to be seen (still not sure if that meant both sides were now the same or if swelling on one side was still there but no bigger, etc).
It was a shock for us with only 6 weeks to go, im not sure if that was a good thing or a bad thing, but in hindsight I was glad because 6 weeks was long enough to worry, so I really feel for you.
I was also annoyed that it hadnt been picked up at earlier scans as I had had more than usual. We have a check up soon as the hospital want to keep an eye on his progress but we really have no concerns.
If you are worried about anything, speak to your midwife and ask them to do some more scans so they can monitor if the swelling changes in any way.
We got through it by having faith in our baby and, as he was coming to us in 6 weeks, either way it didnt matter to us, it is a blessing that he was born safe and well and we appreciate it every day.