orchid leaves and flowers falling off

[miawyatt]

Hello. I'm new to the group and the reason I'm posting is that my husband got me 4 small orchids last week...they were delivered by UPS in a tall, cardboard box. After freeing them, I place them in an East-facing window. There was still some hint of moisture in the medium, so I didn't water them right away. One of them immediately started losing it's blooms and then several leaves. After a week, 2 others have started to turn brownish. I added a little water yesterday, hoping that it would help. Can you advise me as to what to look for next? I want to save these beautiful plants, but they didn't come with clear instructions, and I'm not even sure which type of orchid they are. I appreciate any advise you can give me to get started, but it might be urgent at this point.
Thanks