My little has had trouble falling asleep lately. The only way to get her to sleep is if I lay down with her in total…

My little has had trouble falling asleep lately. The only way to get her to sleep is if I lay down with her in total darkness. But when I lay her down she cries and screams for about 5-10 minutes before she falls asleep.

I used to be able to just lay her down and she’d fall asleep on her own.

Is there anything I should be doing differently? Is it bad for her to cry until she falls asleep every night?