Yeah, what they said, but I just have to say... 5 loads of laundry a DAY??? I don't even understand that. How can a family of four (it is four, right?) possibly generate so much dirty laundry, even with a new baby? That sounds like part of the problem right there. If every day is consumed with five loads of laundry, no wonder it always seems like the chores are never done.
You told us about these problems a few months ago right after the baby was born, and it's obvious that nothing has improved. I'm not going to tell you to move out, but if you're making your dad's lunch, doing the entire household's laundy daily, doing the entire family's dishes (I think you mentioned that before, and I was shocked at how many dirty dishes your family seemed to generate as well), on top of doing schoolwork, you're being abused. Something like doing all the laundry might be a normal chore for an 18yo if it's basically your only chore, but being expected to handle that much laundry by yourself every day on top of your school work and all these other chores is ridiculous. I'm not going to tell you to move out, but you need to take some kind of stand.
Just to put things in perspective, I was a child of a divorced mother of two who was going to night school, and while I was certainly expected to help out and do a wide assortment of chores, it was NOTHING like your load! We were responsible for doing our own laundry weekly (or as often as needed), doing a load of towels/bedding weekly, keeping our bathroom clean, keeping our bedrooms clean, helping get dinner ready and the nightly dishes picked up/washed, making our own breakfast and lunch, sweeping/vacuuming the common areas of the house weekly, mowing the lawn weekly, taking the trash out... but none of this was stuff that consumed us day in and day out or interfered with school. And we didn't have a stay-at-home mom who was available to help out and do some stuff herself.
Should we just call you Cinderella? I guess you're short two ugly stepsisters...