living with in laws

Because my husband and I are young we stay at his parents house. There are 2 sisters, a father and a step mom. Although the family tries being supportive. Often times I feel extremely overwhelmed with house chores ( cooking and cleaning) and because there is a young child in the house it's always messy. Being pregnant with my first child I don't have has much energy as before, cooking meat makes me feel nauseous and I don't want to complain lest I seem to be nagging too much. I get easily annoyed when the two older sisters don't clean up in the morning and just watch TV. They do help with washing dishes at dinner time and sometimes they cook the meat but I really still feel overwhelmed with work. It's gotten to a point where I'm constantly moody and I want to know what I can do about it. Right now my feet are swollen and my body hurts from chores and I'm just exhausted. I can't even do half the things I use to do before I got pregnant. Please help.