Please dont look on the internet- it is the worse resource open to a pregnant woman looking for answers on something that is so case specific. If you need more help and advice phone up your mw or hospital and ask to speak to the head mw, they will get your scan out and talk about your possibilities. When looking on the net you see the worse case scenerio.
You are half way through, and the scans are getting so advanced that they pick things up that before would never have been identified, and often they would have sorted themselves out.
If you need specific advice Im not sure, but maybe you could go for a private scan and they would give you more advice?
All the best, I truly hope it all works out for the best, take care of yourself x x x x