Re: Nursing 7 week old every 2.5 to 3 hours seems impossible
Frequent nursing and afternoon fussiness are totally normal. My son never once went 2.5-3 hours between feedings (except maybe at night on rare occasions). I think making your baby wait to nurse will just make for an even more unhappy baby.
Do you have a sling, wrap, or carrier? At that age I just tucked my baby in the sling and nursed him pretty much around the clock. We went for lots of walks with him in the sling, and that made him much happier too. Also a lot of my baby's evening fussiness was gas, and tummy massages and bicycling his legs between each feeding during the day helped to work out some of the gas incrementally so that it wasn't so bad in the evening. Evening baths helped too.
K. Sophia - Mama to my little lactivore, the amazing Mr. X (11/10).