Advice

My son is 4 months old and I’m going back to work the beginning of March, when I’m scheduled I’ll only be working two days. I’m seriously worried because the times we have given him a bottle he doesn’t take it well, there has only been 1 time he ate it in 5 minutes the other times it takes anywhere from 30 minutes to an hour. My husband will be watching him while I’m at work. Has anyone else experienced this and have a way to help bottle feed him? He’s on breast milk only

Thank you in advance