Girls, thank you so much for your tips. You make my pumping life easier!
My baby's weight today was 3840 g. So she's gained, which is great. I'm giving her some 350 ml of controlled milk per day, of both my milk and formula, and BFing as much as she wants. I will go on with the pumping and gradually eliminate the bottles. I hope she will accept that! Sometimes she'd reject the breast, I guess the milk comes too slowly...
And! I'm not seeing that nurse anymore, I have asked for a substitution :-)
Thank you again for your support, chicas de la leche. Don't know what I would be doing without you!