Dd has been the same and cries when we put her to bed now when she was fine before

But tonight she was less scared. Hopefully it's a phase they'll get out of soon, it's horrible seeing them scared isn't it? She even gets panicky if she sees car lights outside in the dark now and makes us pull down the blinds/shut the curtains when it gets dark.
Your LO sounds a lot more unsettled though, I guess you'll just have to keep reassuring her til she forgets about the bangs.