Peanuthead, what an awful rollercoaster you are on and I totally sympathise.
I am on my 4th pregnancy...but have had two terminations and know all about the awful tests, scans and waiting.
In brief: 1st pregnancy, first scan was at 20 weeks. Heart and brain and other abnormalities were picked up, and Edwards syndrome was their first guess. I had an amnio, and they warned that although the tests might come back clear for the major trisomies, I needed to wait the full 2 weeks for a clear picture. This was true, initial results showed clear, but we knew from the scans all was not well, and two weeks later a chromosomal abnormality showd from the cells grown. It wasn't Edwards, but an un-named chromosomal problem. Scans at Kings had also shown a bleak pic and we decided to let our little one go.
2nd preg: had nuchal scan, reading average, and combined bloods gave a very good odds, so we left it at that! And now our Dd is almost 3 and lovely!
3rd preg: thought we could only be hit by lightening once, but nuchal scan was on the high side of average, and combined bloods then gave us 1:80 odds. We opted for a CVS, done at Kings. They scanned and found heart problems amongst others things. Initial results after 2 days, all clear for major 3 trisomies, but obviously we knew there were heart problems. After 2 grim weeks of waiting, full results were also clear, much to surprise of consultants. But the heart specialist at Kings asked the lab to do a FISH test which probes for a particular chromosomal abnormality. 2 days later we were told it was Di George Syndrome. World fell apart a second time, much heartbreak. As scans had shown such major problems, we decided to terminate again.
4th preg: 19 weeks and counting! Nuchal was a very low reading, but combined bloods gave us 1:230...not bad odds but still considered high risk, and with our history, I felt we would be that 'one' again. However, scans, back up at Kings, looked for nasal bone, and lots of other markers, and they re-did our bloods. Taking everything they had seen into consideration, our odds changed to 1:23000 (or something great, my brain is gone..). So on the strength of this, we opted out of the planned CVS. Scans at 16 weeks all looking good, and 20 week ones soon.
Sorry, said I'd be brief. Just can't condense my babies precious little lives. I guess what I am trying to say is that it's worth having the scans and tests, because you never quite know how it's all going to work out.
And I know what you are going through, the un-certainty etc. Do get a second opinion if you need it, ask as much as you can. Every pregnancy is so different, and you have to do what you feel is right for you and your family. ARC were fantastic for me, and have been so helpful. I have cried on the phone to them many times in the past, but that's ok.
I am thinking of you and wishing the time to pass quickly.
Hugs, Lins.xxx