Diaper changes can be a devastating experience for a child with heightened sensitivity. Swaddle her arms in midline and leave the blanket bottom open for the change. Use warm, wet cloths gently and talk her through the change.
See No Cry Diaper Changes. >
Tummy time three times a day, 20 minutes at a time is a great activity to build into the day. You may need to participate in it for her to remain calm. Stop when she is no longer happy. See Terrific Tummy Time. >
Let bedtime be the same time every night. Build your own routine something like this; Bath (dip her swaddled in a dish towel), big fluffy towel massage dry, diaper change with “this little piggy” foot massage. Then, ocean sound box, bottle or breast with Mommy in a chair by the bed, two classic board books (same ones every night), put baby in bed, say goodnight and I love you, and close the door.
See Bedtime Rocks > and Soothing Baths. >