Help with a 5 year old PLEASE!!!

Okay mommies, I got a 5 year old who is constantly defiant at bedtime two weeks in a row taking her to a doctor on Friday to make sure she's okay. We are using the words "nightmares, I want mommy, nothing will work, I don't want you, you can't make me...." the list goes on. We've used lotions, melatonin 5mg, lavender oils and even letting her fall asleep on the couch first, an hour with no noise tv nothing, early and late bedtime frames... Stories, prayers, calm conversations NOTHING has worked.. I don't feel like this is a phase anymore....HELP