If you have a baby who is no trouble at at all and all goes smoothly, don't worry that there is something wrong with your baby. You might just be lucky!
I was really concerned Flynn was autistic for the first 3 months of his life. I know it sounds like I am being flippant but I was seriously concerned because he was such a quiet and sleepy baby. He gave me not a speck of "trouble" in the usual sense for the first 3 months, which for me were honestly the easiest (6-8 months, however, wasa different story LOL!) So I would say be prepared for the "worst" but if you have an easy ride don't feel bad, just enjoy it while it lasts.