**What you describe sounds more like ordinary night waking or a brief partial awakening than sleepwalking**, although a description alone cannot establish the cause. Sitting or standing in the crib and crying does not, by itself, mean she is sleepwalking.

At 13 months, several things can contribute:

- **Needing help to settle again.** Children briefly wake during the night. If feeding, rocking, or a parent’s presence helps them fall asleep initially, they may seek that help again after waking. Night feeds can be part of this pattern, but they aren’t necessarily the cause. [American Academy of Pediatrics](https://www.healthychildren.org/English/ages-stages/baby/sleep/Pages/Getting-Your-Baby-to-Sleep.aspx)
- **Separation anxiety.** This commonly disrupts sleep around her age: a child wakes, notices a parent is absent, and cries for reassurance. [AAP guidance](https://www.healthychildren.org/English/healthy-living/sleep/Pages/separation-anxiety-and-sleeping.aspx)
- **Hunger or discomfort**, including teething, illness, or being too hot or cold. [NHS guidance](https://www.nhs.uk/baby/caring-for-a-newborn/helping-your-baby-to-sleep/)

**She doesn’t need to be having nightmares for this to happen.** Sleepwalking and night terrors involve incomplete awakening from deep sleep, usually early in the night. During a typical night terror, a child looks frightened or confused, may scream or sweat, and often doesn’t recognize or respond to a parent. Your daughter’s ability to respond to your calm voice and settle makes an ordinary awakening more likely—though it doesn’t conclusively rule out a partial awakening. [AAP explanation](https://www.healthychildren.org/English/ages-stages/preschool/Pages/Nightmares-and-Night-Terrors.aspx)

Your quiet reassurance is a reasonable approach. Keep lights low, interactions brief, and bedtime and naps consistent. Note when episodes happen, how long they last, and whether she seems to recognize you; a short video can help her pediatrician assess unusual episodes. You don’t have to stop breastfeeding to address sleep, and night-weaning decisions can take her growth, daytime intake, and your family’s preferences into account.

Discuss it with her pediatrician if episodes worsen, she seems in pain, or she has habitual loud snoring, gasping, breathing pauses, or unusual stiffening or repetitive jerking. Seek urgent help for breathing difficulty or abnormal unresponsiveness.