Besides the 2 you already watched, and for unwanted or unplaned pregnancy I would reacomend 14 sai no haha, Jenny & Juno and also maybe daisuki (in this one the girl wants the child but the family doesn't because the mother is mentally disabled).
Unplaned pregnancy with forced marriage involved I would say Fated to Love You.
There are also some good dramas with unplaned pregnancy like Ai wa Mieru, Autumn's Concerto and Only You but maybe they are a little far off for what you want.
Good luck! =)
