Well, I had a 1:3 which was pretty devestating. Mostly I think stemming from a nuchal of 4.6mm but bloods were not great (PAPP-A 0.6, HCG 3.0)
Already had a DC aged 2. Was booked in for a cvs 6 days later but changed my mind in the meantime because I knew I would carry on regardless (there were no other soft markers either).
Ended up having an amnio at 16 weeks because DH really wanted to know, but it wouldn't have changed anything and I would still have carried on.
As it was fast results back on the Friday (I had it on the Wednesday) all clear for Downs, Edwards, Patau, full results I think were two weeks - again all clear. No-one mentioned paying for the fast results - but I would have given the choice.
I did not appreciate at the time that this doesn't mean all is fine and there might still be a problem, but no way of telling what until birth and still waiting that one out....
Don't know what advice I can give you other than to say 1 in 50 is not so bad - 98% chance all is fine. I was pressured into the amnio really - if it was just down to me I would not have had it. I don't want to put you off if you decide it is the best thing for you, but I found it very stressful, but not painful. If you wouldn't terminate, is there anything to be gained from knowing?