I had one in my right shoulder thanks to an encounter with a bear and an untrained coyote/dog. The dog was mine, the bear was wild. Kylee attacked toward the bear repeatedly. I managed to hold her, but injured the shoulder and it became frozen. The doctor wanted surgery, I didn't. He offered exercises. I did the exercises and visited my chiropractor/kinesiologist regularly to be tortured. It worked, but as often happens, the 'freezing' transferred to the unaffected shoulder. The left one is fine and the right one - the original is almost normal. I have full range of motion with only a little pain and can lift anything that I could before. I agree, missing sleep and not being able to dress yourself is the pits - and I live alone.
There is a website with a doctor or therapist in England whose exercises were helpful. He sells a video program that he feels is very effective. Here it is
http://www.frozenshoulder.com/
The program would work for you as you have someone to do the therapy to you. That's why I never ordered it.