When to change nipple level!?

Brianne

My daughter will be 3months in a week. We don’t have a pediatrician appt until 4months, so I am not sure when to change the nipple level. I know it says 3m+ on the level 2 nipples. She eats 5oz every 4 hours, give or take. It usually takes her 20-30 mins to finish her bottle.