My 3-year-old daughter is having a lot of difficulty falling asleep at night and I'm exhausted from it.

If your 3-year-old child is having difficulty falling asleep at night, there are a few things you can try to improve their sleep hygiene. Make sure they have a consistent bedtime routine, avoid screens an hour before bed, and keep the bedroom for sleeping only. It might also help to remove any stimulating objects from their room, encourage outdoor play during the day, and consider adjusting their nap schedule. If these strategies don't work, consulting a healthcare provider for further advice may be beneficial.