I was a 1 in 2 high risk we had a CVS and amnio both came back all clear but at our early morph scan we were not so lucky we have since found out we are carriers of a rare genetic condition so my risk is automaticaly 1 in 4 now with every pregnancy and i have to go straight for a CVS at 11 weeks so i understand your concerns as i am currently 5 weeks pregnant i have a 75% chance this baby is normal and a 25% chance it is not it is a very scarey time but i try to be positive and hope the nature has chosen a healthy baby for us this time.
Good luck i hope it all turns out for the best.