3 years old bad dream

Hey ladies

I’m a FTM and I have twins. I’m a really anxious and hyper vigilant mom due to the trauma I experienced after losing my dad.

This past week my almost 3 1/2 seems to be having bad dreams or is scared of something. They are home with me all day and nobody else watches them. She got hurt by hitting her head on a barstool and I’m assuming that incident freaked her out and now is having some sort of anxiety behind it. Is this common for this age to begin to have unsettling dreams?

I spoke to my sister in law about it and immediately she said begin praying that’s not good. So basically I was already on edge and after that conversation it made me feeling worse. Any thoughts or insights mama’s? Has anyone gone through something similar that can ease my mind.