Five month old eats every two hours...

My sweet girl has to eat every two hours and it’s getting hard. It use to not effect her sleep habits and she would sleep 6-8 hours straight, but she is in the mist of the regression and if she wakes up two + hours since her last feeding she is hungry. I’ve even tested it to make sure it’s not a eat to sleep situation. If it’s less than two hours, she will be back asleep in a minute or two. If it’s more she won’t go back to sleep and will actively eat for ten-fifteen minutes before going back to sleep. She now sleeps four hours, four hours, two hours, two hours, and wakes for the day. It’s getting hard because she wakes more frequently with the regression so she has been eating more often. The real issue though is I can’t go to work without stressing because she refuses to fully eat from a bottle. She will take an ounce or two, but then just stops. I have to plan my work to make sure I’m not gone more than 3 hours at a time and she is typically upset once I get to her. She use to eat every four hours until she hit three months and now it’s every two....I don’t know what to do! I just want her to last longer between feedings!!