Have a look at the incidences of reported listeria cases, and what they were caused by. And then make up your mind how much of a risk a bit of pâté is 
Fwiw, I avoided completely until 20wks because the big risk from fat soluble vit A is that it could cause problems with organ formation in the foetus. Since then I have eaten pâté maybe three or four times; once at a wedding and a couple of pots of tesco's finest chicken liver parfait. It was delicious.
Balls to Christmas dinner, baby is due on the 30th nov - I'm eating nothing but pâté for the whole of December 