Am I doing this right?

The past 2 months I question myself as a mother. Especially with Caleb right now. He used to sleep through the night until about 6 months old it all changed. Every 3 to 4 hours he would wake up. Some times he would give me 6. I know during this time he had a cold, and about 5 teeth come in. I was struggling so I went back and read the baby whisper. I used this book with Allison and it totally worked. We have tried it with Caleb and the first few nights were tough. The first week went great. Kyle would get up and soothe him. I did not get up because I did not want him to think he could be fed. He did not need the food because he was getting enough solid foods and milk during the day. Well this past week we are back to square one. Last night I was up with Caleb for 2 hours. I decided to warm a bottle and he totally took it. I knew he was hungry because his tummy was rumbling. Then he woke up at 6 and I was frustrated. What did he need? He has been feed and I do not want to feed him until 8 so we could stay on our routine. Also Caleb cries in his bed and he cries in our arms. He does not want to be held all the time. I finally calmed him down and he slept another 30 Min's. He looks so tired. He is a happy baby and smiles a lot but he is fussy during the day. I question the books I read because they tell you not to let them get used to eating at night. They always say do this don't do that, but never answer the question, what if this happens? They make it seem so easy. They say not to give him props to fall asleep. How did our parents do it? Did they have all the knowledge (books) that we have now to teach us to teach our kids to sleep? I find it more frustrating with all the books. Everyone has an opinion what way we should do it. How do I let that frustration go and just let my own heart guide me. Yes, I hate getting up at night but I know when he is a teenager I will have more trouble getting him out of bed rather then staying asleep. I just pray the Lord help me because it defiantly isn't any easier with your second child. You sill will question every thing you do.