Sounds like you are doing very well on working through things!
Some dogs can be snippy, as you've found, about being approached/nudged when lying down. Often that disappears in time as you get to know each other. You can sometimes help things along by dropping a few treats near her when you pass near her bed; don't need to stop or speak to her, just drop a couple delicious little morsels on your way by. (FWIW, one of mine sleeps at night in a soft-sided exercise pen -- big enough for a bodacious bed; keeps everybody safe.)
After things have settled a bit more, do a search in this forum on "trading up." You can use that procedure to teach a pretty good "Drop it!" It takes a lot of practice to get a dog to drop a raw bone on command, but lesser objects are easier. You did well to get it away from her, by the way.