My baby's a week old and she latches on my right breast with no pain (but still a shallow latch no matter how many times I try to correct her), and it's like she's relaxing into the breast... Taking her time, I can hear her swallowing sometimes

But she has a much much stronger latch on the left one (hurts in the beginning) and with that one I hear aggressive sucking, and she lets go after 10-15 min, sometimes even 5

Does that mean my letdown is slower in my right breast? Is that a problem?