My phal has two withering buds, one new bud, and one half-open bud. Please help!

[aprilmayjune]

Hi you orchid experts!

I received a Phal about a month ago, completely in bloom. Within a week or so, all the buds had withered, and one small leaf had turned yellow. It was by a HUGE west-facing window, so after reading up I moved it to my bathroom, which has a smaller, east-facing, frosted glass window. (I wonder if the light here isn't too low though... )

When I moved it, it had three buds that hadn't done anything. After almost a month, all those buds did was begin to open one petal.

I was hoping that with patience they would bloom, but a few days ago two of the three withered too. However, in one of the empty spaces where a bloom had been (is there a word for this?) a new bud emerged!

I'd like to know if I should cut the spike of my Phal -- and if so, how much? Also, I'm worried about the state of a few of the roots. Of course, if you notice anything else I could fix or improve, I would really appreciate it!

From the bottom of the spike to the highest point on the spike, the Phal is about 8.2 inches. I haven't given it any fertilizer yet, since I read that when it has buds/ blooms this is bad for it.

Any help would be very appreciated! This Phal was a gift from my boyfriend and so far I have killed every other plant he's given me...

Thank you!