Hi Samantha! First you need to get that last remaining leaf uncovered from the potting soil. Did you repot it in the potting soil or did it come this way? Phals won't grow in this, it will stay to moist and suffocate the roots. The roots were/are probably rotting or rotted because of this and that is why the leaves have been dying off on you. But you can't see this happening in the soil so naturally you think it isn't getting enough water (and with rotted roots it isn't) so like you said you started watering it more, unfortunately that was probably the worst thing to do. I would say take it out of the potting soil and see if there are any good roots left remaining. And if you can find some good orchid potting medium to have soaking about 24 hours before doing this so you can then transfer it then that would be good. You'll also need to cut off any dead, brown mushy feeling roots. If the root is brown but feels firm that it is ok to leave it. Also, you'll need a much smaller pot for it, as over potting an orchid can lead to root rot as well if the potting medium is holding to much moisture. Can you find a small 3 inch pot? An unglazed clay pot would be good, but a clear plastic pot would allow you to see root activity. I think I'm leaving a bunch of stuff out, but you have gotten a lot of good advice from others on here. Feel free to ask more questions and we'll write you another book
Welcome to the Orchid Board! We are glad you have joined our family! I gotta get back to watering my collection before it gets any later!