Sleep off the last couple weeks

So my daughters sleep has been very off the last couple of weeks. Sometimes waking at 3:30, 4, or 4:30 and her normal wake time is 5:30 (she goes to bed at 7 lol) but it’s been super off. She is getting her last 2 teeth before the 2 yr molars and is teething but the sleep schedule usually doesn’t get this interrupted. Sometimes she won’t fall back asleep unless we are rocking her which is very unlike her. Any help on getting her to sleep longer? Or any idea what it is? She is 16 months. We try to let her cry it out like we did when we sleep trained her. But she has this new brutal scream cry and made herself hoarse the other day so now we are scared to do that.