1 month and Leaves and flowers fallen off. It is possible to save?

[Chelb]

Hi All,

I am very new to this so hope someone can help.
My hubby bought me my first orchid. It did not come with a tag to identify it, so not sure what exactly it is.

I bought the liquid plant food, that I diluted in water and watered it once with this. I also watered it twice a week by letting water run through and then letting it drain.

The leaves started getting mushy from the inside out, and slowly fell off, one after the other. Last leave fell of yesterday.
The flowers also slowly fell off and no flowers are left either.
The roots are still green when I water them.

What did I do wrong, and can I save my orchid? Only had it for about 1 month.