Trouble having baby sleep longer during the day

Judith • My name is Judith and I'm 24, I have two kids a 3 month old boy and a 4 year old girl. My kids are my whole world :)
I'm really at a point that I don't know what to do anymore my 3 month old only sleeps during the day for 1 hr the most and he wants to keep eating every 2hrs....does anyone know what I can do to make him sleep longer.....I can barely do anything during the day....