Re: Pump, nurse, formula. At a cross road..
I think you have gotten good advice from those who tell you that "only you can decide". Because that is true. But I also think the fact that you are so full of indecision, and that you know you only have a very short time to go in order to finish out the year, means that whatever you decide, today isn't the day to make a permanent choice.
If you get a job, most of them would be provide you with breaks. But not all. Do if you are offered a job, you will need to discuss the break situation. I wouldn't go into an interview saying things like "I am going to need breaks of x minutes every x hours" because that makes you look like a problem employee right off the bat. But if you get the job, then you present the break issue in a casual, positive way.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"