hopeful and fedup I doubt that the midwives will have anything helpful to say/do regarding low Papp-A, you will be better off talking to the hospital team about this. And usually, all they can do is offer you more regular scans to monitor growth, as this is the main problem associated with low Papp-A (don't google it too much, would be my advice). So I'd ask at your 20-week scan appointment, if they don't bring it up.
Moomin About drinking - the driving excuse always works, antibiotics can make some clued-up people suspicious
. I have also done what someone else has recommended - accept a drink and then take teeny sips or pretend sips through the evening. No one has ever noticed anything. Or you can swap glasses with your DH/DP, if he is drinking the same (when no one is looking).
Or you get things like a gin & tonic without the gin, or a Bloody Mary without the vodka etc - no one will know!
Welcome vallinna - and congrats. Take one day at a time, today you are pregnant!
I've not told work either, apart from my line manager. Nor anyone else in RL apart from close family and some selected friends who know all about my mcs. I am dying to start wearing mat clothes, but I don't dare 
My 16-week apt with the midwife went OK - apart from that she couldn't find the heartbeat
- in spite of nearly pushing the flippin' Doppler thingy through my stomach, I was really sore afterwards. She assured me that she could hear baby moving around and offered to come and do another listen today - but I reckon, since I will be getting the amnio on Monday, they will be scanning my anyway again, so I might as well wait for that.