Shared space conflicts, roommates, am i the bad guy

Okay so I am currently living with 3 other girls in a apartment. We all have our own individual rooms, bathrooms, and walk in closets which is awesome! We share a laundry area, kitchen, and living room. We recently had a meeting talking about leaving the lights being left on creating a higher electric bill and not washing a pan after using it. All that is totally understandable. Roommate number 1 says that we need to wash our pots after we use them then the next day she leaves a pan out herself, this is the same roommate that has the thermostat set to 50 degree which is 1 not healthy and 2 really expensive. This is the same person rambling about the electricity... okay roommate number 2 mentions the laundry and how we should have our own individual wash days. We all state the days we want. My day comes and roommate number 2 (lol remember the one who says we should have individual wash days) yea this person is washing her clothes on my day and I dont pay any mind to it and stupidly dont stand up for myself. She then tells me "I know its your day but can we just start the laundry schedule next week" My ditsy impulsive ass says "of course we can" not even making sure she informs the other two. Next morning comes and no one is using the washing machine which is literally a foot away from me. My clothes are piling up so I stupidly wash my clothes on roommate number 3 day. Later on that day she sends a longgggggggggggggg text message in a group message saying how basically over miscommunication how we shouldnt be selfish and blah blah blah. I apologized to her for not communicating and she did not reply back to me. I was under the impression that we were starting next week and that roommate number 2 had already mentioned that to them. i dont know if roommate number 3 thought I was thinking little of her because that was not the case, literally the washer was empty and I used it.