all of a sudden

My baby girl is 6 months old, I breastfeed and sometimes she has my breatmilk from a bottle, has never had issues before with bottles. I went back to work for almost 2 months, she did great with a bottle. I ended up deciding to stay home with her and have been home for not quite a month and she refused to take a bottle today from my hubby and I. She doesn't want it near her mouth and makes a disgusted face when we try. What changed all of a sudden???? Is this normal?