She would soon let you know if it wasn't enough.
All babies are different, I am BF Harry, but he wakes at 6 and feeds then goes 5hrs till his next (and I am fit to burst lol) he will then go every 3 hrs ish til evening then sleep for 5hrs till 6 am, my first was every 4 hrs to the clock, my second (although it felt like it was non stop) every 2 and the 3rd had no pattern at at all.
You know your baby best, and it sounds like you are both quite happy at the mo, its not for anyone, even the HV, to tell you what to do