4 months old

My LO recently turn 4 months old. She havent really been waking up at night for feed. Try to dreamfeed her but she will reject the bottle so i just let her be. But recently, she will suddenly cry in the middle of the night. I thought she was hungry but she didnt want her milk, her pacifier everything. It took me very long to put her back to sleep. Anyone experience this before? I didn't saw any tooth coming out so i doubt its teething? First time mum here. Ur advice will help me?