4mo refusing bottle

Exclusively breastfed, 4 months old next week. I messed up and didn't do bottles sooner. Now she won't take one and I go back to work in a week. She's never taken a paci either. We've been working to have her sometimes tolerate having the nipple in her mouth in lstead of pushing it out with her tongue or screaming. But that's as far a we've gotten. Perfect breast feeder. Anyone struggle with this? What worked got you?