Breast to bottle help

So my LO is almost 5 months and breastfed. I know by February I will be needing to go back to work so my LO will have to go to a bottle but the problem is that she won’t take a bottle at all. I’ve tried four different brands of bottle with pumped milk in them and nothing. I’ve tried giving the bottle only when she’s hungry for a week straight but she fights it and just chews on it. So if any of you ladies have any advice or went through this please pass it on because I need some help.