Boy, I feel like a newbie

I swear it's like I never bf before, and for 9 months at that

So, here I go AGAIN....
Julian has been nursing for 5 mins for 2 days now, and last night only 3 or 4 sucks at each waking and then back into a deep sleep. I would undress him, change his diaper, turn the light on, everything possible to wake him up and he was "dead to the world". His diapers are soaking wet, had a HUGE bm yesterday morning (hasn't had one today yet) and sleeping well during his naps. Some feedings are 10 mins MAX, like thte last one he had, but the first feed of the morning was 5 mins also.
Could he really be an expert nurser at only 5 weeks? Or could something be going on?? If he barely sucks at night, should I try soothing him with the paci to see if it's just suckling that he needs?
Good lord I feel confused
