Bottle help!

A

I have to go back to work in 2 weeks and just recently my son started refusing to take a bottle. He’s breastfed mostly but occasionally we would give him a bottle when I wasn’t going to be around and to get him used to it. I also stopped breastfeeding him for a week and a half when we first brought him home so he had a bottle that whole time before we went back to breastfeeding. He’s doesn’t like pacifiers that much but would tolerate it if I held it for him sometimes so I tried a new paci I bought online last week and he instantly started gagging. Now whenever we try another paci brand he gags immediately and is now doing the same thing when offered a bottle. I don’t know what to do! I just bought the Avent natural flow bottles to see if that will work but idk what I’m going to do if he won’t take a bottle and I have to go back to work. Anyone else run into this problem?