I wish my daughter would sleep

For two weeks - thirteen days to be exact - we had uninterrupted sleep for at least 8 hours a night.  It was heaven. Glorious. I started to feel human again. And Ava was not on any medication.  I was taking her to the pool every day - or letting her go in the baby pool on my deck.  She loves the water.  She adores the water.  She is so calm, so happy, so content when she is in the water.  I even get her to float on her back, as long as she feels me supporting her. And on the fourteenth day, she was up from 2am - 6am - as were we.  She slept through the night the next night - and since, has been up during the night.  Last night it was from 2am - 5am.  We sleep in the same room as she does.  So she wakes up and sees us.  She whines for us to come get her.  When I go to her, she is stimming uncontrollably.  She babbles nonsense, as if talking in tongues.  She tenses her fists and jumps up and down (her typical stimming behavior).  She tries to lay down, but cannot relax because her body is stimming.  I know she is frustrated.  She finally succumbs to sleep when her body has had enough.  You don't know how my heart breaks for her. After she finally settles down to sleep, she will sleep another 3 - 4  hours.  However I have to wake her for therapy.  She is then tired, cranky and groggy and the whole day is shot.  I try so hard to get her into a sleep schedule, but to no avail.  It is a constant game of catch-up. I wish my daughter would sleep.  Not just for her, but for the sanity of her parents.  It is so hard to function on little sleep.