Hi,

He sounds like a completely normal little boy. the first 6 weeks are about survival, so try to get as much sleep as you can, whenever you can. The weightgains and nappy count tell me you have plenty of milk - so that's not the problem/ If you have plenty of milk, then how would formula help? Does your baby sleep with you? Sleeping with your baby (but you must follow safe sleeping guidelines - not be drugged or have consumed alcohol and not be smokers) lets you get more sleep. Does he have one longer sleep every day.
Do you have a baby sling? No mother should attempt mothering without one! The ABA simplicity sling is fabulous - and cheap. Baby will sleep in the sling and you can do a few things with your toddler.
Have you got the info on *tired signs*? it can be common enough to feed them when they are tired, play with them when they are hungry - all ends in grumpy and overtired tears.....
Talk soon
Barb