I feel like a terrible mother

For 2 months my daughter has been acting up during bedtime. I was starting to get her into a routine and then she started fighting me. The last 2 nights have been the worst she shrieks and screams none stop. She's teething she's almost 2 in March. I give her bath like always brush her teeth give her medicine for her gums. I read her a story in her bed then try to get her to go to sleep. She lays silent for 45 mins then if I move she starts shrieking and won't stop until 3. Tonight I just couldn't take it and I left her room and left her in there so I could shower. She freaked out and I know she ripped her night light out of the wall. Am I wrong for letting her her just shriek herself to sleep? I feel terrible about it