Glad your scan went well smurf 
MsJuniper, kids are so funny, bless him. I've begun gradually telling more people at work now and it feels nice to not feel like I have to hide it quite so much (unless there are parents around). Do you have many behavioural issues at your school? I worked in a special school as a TA before I trained as a teacher and I can't imagine how difficult it must when pregnant avoiding meltdowns and dealing with outbursts.
NoParticular, I don't blame you. I think this is all part and parcel of having those negative experiences constantly feeding into our consciousness. It really does mute the excitement and makes you feel like you shouldn't allow yourself to have hopeful, positive feelings. I've said we'll buy things from 20 weeks, one big thing a month to spread the cost but not sure about the little things like clothes etc.
hotcookie, I'm so so so sorry you've had a high risk result. My mum is a specialist midwife and her job involves talking through options for results such as yours, counselling to help deal with decisions etc so if you have any questions pm me and I can have a chat to her for you. I think waiting for the 20 week scan is sensible. I really hope you get some good news from that. Look after yourself and give yourself time to process this x