Need some advice

Hi 👋🏽

So I gave birth on Monday. I immediately started nursing her. She had one bottle during hospital stay we got discharged on Tuesday afternoon. She has had a couple bottles and I had still been breastfeeding. Today I pumped at 11:00am I got 2oz from each side. Pumped again at 2:30 and got 1oz from each side. I’m pretty sure my milk isn’t came in yet and it’s just colostrum because the milk is golden yellow. Is this normal ? Should I stick to pumping every 2-3 hours ? I want to exclusive pump and only offer formula when I have too. I pumped exclusively in 2015 for 9 months for my daughter. But I don’t remember my milk taking so long to some in.