Thanks everyone for your help!
I didn't even think that it could be the delivery and yet it's very likely as the weather here has been pretty cold. Looking at the pics of the blasting buds that Bikerdoc posted, I see it's exactly the problem with my plant. In addition, the office is pretty hot, so I already placed the plant in a tray filled with pebbles and water in order to increase humidity.
Million thanks to all of you! Orchids are very rare here (I'm in the Palestinian Territories) and I'd be heart-broken if it died.
Cheers!