6 weeks, should I feed him rice cereal?

I was told by my doctor to mix baby formula with rice cereal to treat my sons acid reflux and colics. How many of you ladies have heard of this and has it worked? Please help! He will be 7 weeks in a couple of days. He cries all the time, and I can hear his stomach grumble. I can tell he's in pain in the way he cries it breaks my heart! Help please