Вы какой авиакомпанией летите?
Вот данные из Тиматика:
Passengers with a double or multiple entry "C" visa issued by Bulgaria, Romania or a Schengen Member State valid for the period of intended stay. They are visa exempt for a maximum stay of 90 days. Information: The maximum stay is granted within 180 days.
Passengers with a double or multiple entry "C" visa issued by Bulgaria, Romania or a Schengen Member State valid for the period of intended stay. They are visa exempt for a maximum stay of 90 days. Information: The maximum stay is granted within 180 days.
Passengers with a "D" visa issued by Bulgaria, Romania or a Schengen Member State for a maximum stay of 90 days. Information: The maximum stay is granted within 180 days.
Passengers with a "D" visa issued by Bulgaria, Romania or a Schengen Member State for a maximum stay of 90 days. Information: The maximum stay is granted within 180 days.
Здесь нет ничего про отрытие ни шенгена, ни про Румынию-Болгарию, написано, что владельцы Действительных 2-х или многократных виз Шенген или Болгарии с Румынией могут ехать, не волнуйтесь.