u have to feed him in smaller amount but frequently as over feeding baby might cause him to spit up alot, it's normal for baby to spit up milk as their digestive system not yet fully develop normal to poop every 2 days n so
1.5 months with 110ml sound quite alot to me try small feed more often no poo poo for few days is quite common for baby do consult PD if u have concern and worry
u can also gave him a warm bath n massage so he can relax n poop
Richa