Possession is a really hard counter to NV-Bridge if they can possess you in time, which usually they can.
You really don't want to pick up if you can't end the game, unless you are stuck MUCH later on, and then you want to use it to get the lion's share of VP so that you can then limp pretty well to game end. You might also pick up earlier if it gives you pretty good position lead-wise and you are really worried about being possessed. For instance, on turn 14, how much did you have on your mat? It must have been a pretty good amount - I imagine you would have had decent chances STILL at that point if you were to pick up and grab a bunch of points while bringing the game to the brink of a three pile ending, if you couldn't three pile outright. I mean, if you had even two extra bridges to play on the mat, you COULD have three piled outright. Even one will get you very close with a decently large lead. And him possessing you at that point is the end, so you have to strongly consider it.