My first disaster

The first room I decided to tackle in the house was the bathroom. There is lots of wallpaper to be removed. Things were going fine as far as the walls were concerned. It was tedious work, but it was going. Then I got to the ceiling. In the shower. Yes, it was wallpapered. I noticed that a corner was unstuck already so I grabbed it and started to pull. A few pieces of plaster plunked down and I hope it was just damaged in that corner. I continued to pull and realized about half the ceiling was coming down with it. I thought about stopping but what would I do with a half on half off piece of ugly wallpaper in my shower? What was done was done and I had to keep going. Here are some pictures of the aftermath. I've put in a post on my go-to DIY messageboard to see about what I should be doing with this, and whether or not I can in fact DIM or if it's time to call in the professionals.