My 8 month old wont sleep!

Cece • mommy to a handsome toddler
My son takes 3 naps a day his last nap I let him take is 6- 6:30 the latest. And he goes to bed 8:30-9 and he wakes up at 12 then every hour after that and its getting really hard hes been doing it since he was 6 months. I feed him before bed I breastfeed but nothing work has anyone else gone through this?