Hey there,
When Ashy was about 2 1/2 i think she started calling out NO NO NO NO in her sleep and was the same, kicking blankets, not letting me touch her or get near her. In the end she was so worked up and still dreaming that i had to physically pick her up, turn the light on, walk around just to wake her properly cause she was so worked up. Once she woke up and realised it was me she was fine, and i put her straight back to bed and she went to sleep no problems. She still every now and then sleep talks or calls out in her sleep. She doesnt often have nightmares, but if she does I just keep talking to her and telling her its ok and mummy's here and she kinda snaps out of it and goes back to sleep.
Its very common for kids to start having nightmares around 2ish.