I submerged the pot in water thismorning for about 20 minutes, and it's setting on the counter out of direct sunlight.
Please don't submerge it again, especially not for twenty minutes. If I had to guess if it is over or under watered, my money would be on over watered. let the water it already has carry it for a while. A healthy Juniper needs good light, actually as you now know, it belongs outside. But since it is the middle of winter and it has not been outside up to now I really don't know what to tell you. Not really your fault but selling these tree to unknowing people in the dead of winter is really a horrible practice that surely results in thousands of dead trees every Christmas.