Wow - what an amazing journey for you and your family and your DD!
As for pu/pd, at 19 months I don't think I'd bother. Depending on her language skills, and probably regardless of them, I think I'd go more with a more verbal way of handling the night wakings. I'd probably work with her to make her room a place where she wants to sleep, so maybe she can pick out a special night light and a picture to hang on the wall. She might also be inclined to choose a comfort item/lovey that she can keep with her at night.
When Josie went through a phase where she was coming out of her room numerous times throughout the night for a "nuggle" (snuggle), we finally told her that she could have one BIIIIG snuggle at the beginning of the night, and then after that if she needed a snuggle she could snuggle with her "bedtime buddies." It worked so well the first night - I reinforced it all day before we tried it that night - that I could have kicked myself for not thinking of it sooner. :?
Anyway, those are my thoughts; hope it gives you a place to start.
Keep us posted!
Cheers,