Hospital bag essentials?!

My boyfriend told me I should focus on preparing my hospital bag since I'm thirty five weeks so it is prepared for any emergency we could have. I don't know where to begin! What did you put in yours? I don't want to overpack but I don't want to forget anything that could be of importance. Oh, also, I plan on breastfeeding so should I not pack formula and a bottle or should I in case baby doesn't latch? FTM here lol, any advice is appreciated!