You're not alone. My little guy is 5 weeks and sleeping anywhere from 2 to 4 hours with not much we can do to influence how long he does. If anyone was telling me what they're baby was doing at this age I think I'd just say "that must have been good/bad for you" and try to focus on my baby.
no two babies are the same and a pediatrician's time table is the only one you should go by. Even then, remember that most milestones occur in a window, not always by a set date.