I need help from any breastfeeding mommas!!

Nicole
Okay so I breastfeed my son part of the time and he gets formula part of the time along with baby food. My question is, how do I get him to sleep longer than 3-4 hrs and stop waking up 2 or more times a night? He's still in a bassinet in our room and his bedtime routine has been; bath, some baby oatmeal, then boob and he falls asleep. All that is around 830-9 well then he's up at midnight and again at 2 and 4 it's becoming to where we don't get sleep and I'm trying to get over a cold but the lack of sleep is taking its toll. So any and all suggestions would be great!!