An app for watches that will wake you up during nightmares

I live with complex PTSD, and one of the most difficult parts of it is the night terrors. I don’t just wake up startled my heart is pounding, my body is shaking, and it feels like I’ve been running for my life in a place I can’t fully remember. Sometimes I lie there frozen, trying to calm my breathing and remind myself that I’m safe, but my brain hasn’t quite caught up. It would mean so much if there were something that could pull me out sooner, anchor me back to the present, and help my body and mind remember that the danger is over