Sleeping

I just don't get it...the What to expect website says that you can start your babies to sleep through the night at 6 months of age and I was going to, but...his doctor says not yet that babies at his age still need to eat in the middle of the night :/ well I am so confused on what to do! Anyways I am wondering because he is driving me crazy!!! The last 2 nights he has been waking up every 1-2 hours, is he sick? is he hurting? who knows?! But I have not been able to sleep and I am getting very impatient with people and I have not been very friendly! I mean who would on little sleep?! grr... I am so annoyed that I could just choke the doctor or the author of that stupid book for telling me to do or not to do something!
I mean what am I suppose to do just wait until he is 3 to get him to sleep?! WRONG! I just don't know anymore, I am starting to believe that I am just clueless on this parenting thing and I might just mess up my children for the lack of parenting skills!!