How??? 😩😩😩

So how do y’all get your kids to sleep through the night? I have a 1 year old and a 2 month old and it seems as if they NEVER sleep and this mamma is about to lose it! My 1 year old had never slept well at all I’ve taken her to 2 different drs neither one of them were concerned nor had any idea why she doesn’t sleep I thought maybe my 2 month old was ganna sleep good cause she was only waking up once a night then out of nowhere she started waking up 3+ times a night.... why are my kids like this? So many have kids my girls age and they say they have no issue with sleeping and their kids have slept through the night since 2/3 months old