Sleep Regression....

Hi ladies any moms with 18 month olds that are experiencing sleep regression? I have noticed that my daughter who napped like a champ is sleeping less but more fussy. She is now screaming at bedtime and wakes up an hour after she’s been in bed and doesn’t want to go back to sleep for hours later. I think she’s using the one hour she’s asleep as a nap. Do you have any tips or things that have helped? Her routine hasn’t changed she’s just changing her sleep pattern. She sleeps with a sound machine that turns off after an hour, has a lovey, and we still have the same bedtime routine. Any tips would be appreciated.