Baby fussing at breast

My 3mo just went two days using a bottle to eat while I was at a training/conference. I still breastfed her in the mornings before I left and once I returned home. Today I wanted to just exclusively breastfeed like we normally did prior to my conference but she has fussed all day when nursing. She would eventually nurse but this evening when trying to get her to bed, I decided to give her a bottle and she stopped fussing and sucked it down quicker than she has ever before!!! She has always refused bottles from me, especially anytime near bedtime. Honesty it hurt my mommy feelings a bit that she chose a bottle over me :\ Do you think she is just going on strike or maybe my supply dropped? I pumped every 2-3 hours while I was away. I only pumped for 10-15 minutes because my breast empty quick then stop no matter how long I keep pumping (total of 4 to 6 oz per session)