My Dd who was 3 in September us exactly the same, she also has nightmares. If she sleeps with me I get no sleep as she kicks and tosses all night as she dreams. But if she's not in my bed the nightmares are worse. So I have her bed in my room, she starts on her own mattress but usually ends up on mine and if the kicking is too much I get into her single one!!

I have asked around a bit and people tell me it's a phase. I hope so, we both need better sleep!!!