Hello Allison, welcome to the OB.
As Ross has stated, while bright light is welcome, direct sun light must be avoided as phal's leaves can get sunburned easiliy.
What is your phal potted in? phals usually come in sphag moss that is packed in too tightly which tends to hold too much moisture. As you browse on care for your phal on the OB you'll see that most of us like to repot as soon as the new plant comes home. It will give you a chance to evaluate the root system and give the plant a fresh start.
As for the potting media, every body has their own mix, but for phals I have come to like a med fir bark mix with a bit of sphag moss. I water once a week, twice if its too hot and media goes dry.
If you don't plan to repot anytime soon and are still worried on how often to water, take a bamboo skewer and dip it in the media halfway take it out and if it shows moisture, give the phal another day or so before watering, that seems to be the most effective way to test for moisture.
I can't tell you much on your blooms though, whether is a sign of nature or stress I can't tell since we don't know how long it was blooming before it was given to you.
I hope I didn't confuse you

I'm sure our fellow members will come by and elaborate on our posts.
Keep us posted on your phal's condition, pictures are always welcome
Priz