Night Terrors???

We got a 3-year-old little girl on Wednesday. We are able to get her to sleep ok enough...not super easy, but we are getting a routine down. But after about an hour or so she will wake up and just cry...and then it happens multiple times in the night. We are kind of wondering if it's night terrors since she just doesn't respond at all when we ask her what she wants or if she's scared, etc. Last night we ended up just letting her cry herself back to sleep after going in and checking on her for the 5th time...but I hated it! Any one else out there dealt with a similar situation? Any suggestions would be greatly appreciated. Her little sister is 14-months-old and has been in the hospital but we are hoping she can come home tomorrow. Would be great if we could find a way to keep her sleeping or calm her more quickly so she doesn't wake her sister up....2 awake will be even worse than 1!