Quick question.

My milk didn’t come in until four days after my daughter was born. I tried to get her to latch which she does periodically but I’ve been pumping every 2-4 hours. My question is, is it true that you are supposed to wait until the baby is 6 weeks old to start pumping because you can cause a over supply? With my first daughter I pumped and ended up having to stop because my milk supply became low. I feel discouraged now but in all honesty I’d rather have an overflow than underflow so she can have milk. Please give me you honest feedback. Should I continue to stay on my pumping schedule or let her latch as much as possible as well.. I usually let her latch as long as she wants if she sucks her hands like she’s still hungry I give her pumped milk in a bottle. Then I’ll pump after she feeds.. if she just takes a bottle I’ll wait until 2-4 hours when she gets another feeding to pump again.. Help