it sounds like your health nurse needs a bit of a lesson in tact.
The current WHO reccomendations are that babies should be breastfed exclusively until 6 months because their gut is still immature and the early introduction of solids can lead to allergy issues later in life.
If you're feeding solids early it might be best to make sure you offer the breast first so that the solid is an extra not the meal. Also maybe hold back on introducing anything new for a month or 2
I'm not sure how many feeds a baby needs in a day at that age. I just popped them on the boob any time they seemed a bit narky in case they were thirsty or hungry. With summer here you might find that your DD will want some extra feeds because she's thirsty.