C.B.
If she's not taking a nap and not going to bed until 9 - 9:30, she is overtired. Try moving everything up a bit - nap a bit earlier and bed quite a bit earlier (8:00 - 8:30). Also, train her to stay in bed. I know it's "easier" for you to just sit there with her, but she's not learning anything. Put her in bed and leave the room. You will have to put her back to bed probably several times the first few nights, but after that it will be done. You could put a baby gate across her bedroom door so even though she gets up, she can't get out.