14weeks and still eats very often

Kathy
So I have a 14 wk old daughter and she nurses every 1.5-2 hrs won't nap for more than 30 min and only sleeps good at night waking once or twice to night feed. Anyone know if it's normal and or what I can do to have her nap a bit longer? I just feel she's not getting enough rest during the day. 
Someone told me to add a bit of rice of oatmeal cereal to a bottle of breast milk ??? Any advice ?