Is it possible after a body massage to suddenly get impotence when it was never a problem before?

Yes (read remainder): Yes, it's possible, but that doesn't prove cause & effect. More likely than not, it was just coincidental. In other words, you were bound to get an episode of erectile dysfunction regardless of whether you had a body massage or not. On the other hand, let's say you felt guilty about your massage, that stress could translate into ed w/your partner. But a physical link? Not likely.