Błędnie: Recently I've been occupied with worries about organizing the removal- it proved pretty difficult in fact. Poprawnie: Recently I've been preoccupied with worries about organizing the removal- it proved pretty difficult in fact.
"Preoccupied (with)" oznacza 'zaabsorbowany, pochłonięty, przejęty'. "Occupied" łączy się z przyimkiem "in" i oznacza 'zajęty'.