What choice do you regret in breastfeeding journey

I regret immediately using nipple shields as suggested by nurse and not latching without one in initial weeks.

Now baby at 3 mo wouldn't latch without them and have to pump regularly for emptying breast and don't even ask about all hassles of cleaning them.

What do you regret and wish you did it differently?

Edit: Thank you everyone for the responses , I have learnt so much from this post.