Two-and-a-half-year-old suddenly waking and upset at night, any advice?

[Gba]

Hi everyone looking for some advice ,
my daughter is 2 and a half , she’s always slept quite while even from newborn, but the past 3 weeks she’s started waking up 11pm.. till midnight then 3am till like 4:30 kinda same time every night and she’s screaming , upset and we have to get her to sleep again , she goes to sleep pretty quick in the middle of night but trying to leave her room without her waking up is a nightmare! You could be waiting a hour and a half and in that time your attempting to leave but she knows and will just scream, so it’s really taking a toll with the interrupted sleep, 3 weeks ago we’d get her to sleep and she slept through the night only the odd wake up, we don’t know what to do! , to get to how it was before, as she’s so tired in the day as well! Any tips would. Be great ! She also doesn’t nap and hasn’t for a while

We had this for a little while around the same age. It was a mix of night terrors when she was still asleep but upset and then time she would wake up and not go back to sleep without someone next to her. It lasted around 6 months, was not every night (thankfully!) and then just stopped. She’s 6 now and it’s a distant memory and she is back to being an excellent sleeper. But it was hell at the time!