Help! My 3 month old is rejecting bottle feeding! How can we get her to suck the bottle?!

My girl just turned 3 months and is exclusively breastfeeding. She has had a bottle several times before when I have to run errands for example which not often. She started rejecting ALL bottles. I have 2 go back to work in 3 weeks so we have decided to try her every single day with expressed milk in a bottle. Is anyone else going through this battle! We found a nipple that she doesn't hate and is not making terrible faces to but she is not latching and sucking the dang bottle! My husband or mother tries to give it to her.

This is stressful. Please help. Have u gone through this?