I bought this plant about a month and a half ago. It was in bloom, 8 flowers and 2 buds on the end. The buds never opened but the flowers stayed the same. A few days ago, I noticed the flowers are curling up. Then one dropped off. The two next to it look like they will drop soon too.

The little stems on the individual droopy flowers are turning brown, but the main stem is till green, as are the individual stems on the healthy-looking flowers.

The leaves are bright and firm and look very nice. The two buds have still never opened. I water by putting an ice cube in once a week. Does this seem like a normal cycle? I know the blooms don't last forever, but the unopened buds worry me...