😩😭 my son still doesn’t sleep through the night

Sallie
Is anyone else still getting up more than once with their little one at night? My son wakes up at 1 am and then at 5am. He is teething and absolutely hates a soaked diaper because I gets cold so I don’t mind getting up once to avoid a diaper rash and to make him comfortable but I’m 35 weeks with our baby girl and I’m worried about never getting anything sleep with a new born and a 16 month old. (He’ll be 16 months when his sister is born)
Is there any tricks I can try to help him sleep better? Is twice a night normal?