There's a line, and I'm trying to find it again, in a Stormblood quests that references an event in ARR and states it happened 1 year prior. So the real timeline from 2.0 till now is probably 2 years at most.
Dunno what's going on with the pregnancy, except none of the races are human, so maybe pregnancy lasts less than 9 months? Or it's also possible that she was already pregnant when she left with him? Or even just time is all Jeremy Beremy in this game.
