I feel exactly like that, vulnerable and safe at the same time.
I am officially announcing that Mr. M. and I are moving to Madrid. This is the 4th city in 4 years (London-Oxford-Barcelona-Madrid). Barcelona has been absolutely fantastic, but Mr. M. has been offered a dream job (yay!), for which we are really happy. Nonetheless, I am now trying to finish my course, find a flat, pack this one and apply for more courses in Madrid. So yes, happy but still unsure. I never thought we could be such nomads.
PS: Spanish flats for rent tend to include furniture. And I mean "grandma-just-died", ugly, barroque, dark furniture. Not only that, but if you see a 40m square flat it's probably cluttered with two sofas, two armchairs, several wall shelves, TV furniture, coffe tables, dinning table with 6 chairs, two beds instead of a double one, golden lamps, etc. I'm heroically cruising through the see of bad (or lack of) interior design. Wish me luck!