I want my milk back 😥

My baby is almost three months now and we've been doing such a great job breastfeeding I was producing so much and my boobs were always full. My dad just came to visit and while here we were driving a lot so we would give her a bottle in the car and there were a couple times that we were just in an area where I had no where to breastfeed and we gave her a bottle. Well now my milk is starting to go away and I need tips on how to get it back. She's still breastfeeding but she just gets so hungry because I'm not producing enough. I need help.