Breastfeeding to Bottled Breastmilk

I have been exclusively breastfeeding since birth. My baby girl is now 12weeks old.

She has started biting/pinching me with her gums this past week, to the point where I struggle to finish a feed due to pain. She does this throughout the entire feed.

I know that there isn’t a supply issue as she isn’t hungry and completely content.

I am now debating pumping milk out and feeding it to her in a bottle. This was the plan from 6months onward anyway.

Has anyone done this, or have any tips going from breast to bottle? Will it be a case of my husband giving her the odd bottle to get her used to it, while I still breastfeed, or do we both start feeding with bottles throughout?