Please try not to worry, you have done the best thing for her. My youngest son has a speech delay. He was always on the bottom of the scales with how many words he would say. He has great hearing, so I was so worried, especially having two older children that were talking by the age of 1 1/2. He didn't have to speak either, and figured that out early, he's very smart... I talked for him a lot, when I should have been having him tell me what he wanted, plus having older siblings. Around 3 1/2 he just took off speaking, he's 4 1/2 now, been in preschool this year and is doing much better, but it was when he was ready too. He does get frustrated sometimes when we don't understand what he's saying.
Please try not to worry, you daughter will be fine. Actually my son's dentist told me he had the same problems as my son and he was in speech and you would never know he had problems speaking... She may want to speak later, around 3-4 and that is okay and there is nothing wrong with her...
One thing you can do, is repeat the word. If you know she wants juice, say, What do you want? Then have her attempt to say something. Then get the juice out, say something like "you want Juice?" "Here is the Juice" or something like that...The therapist will have steps for you to do too... don't worry, I think you are an incredible mother who loves her baby!