Job: Babysitter (United States)

I watch a 2 year old every day Monday through Friday. 10 hours a day, I have been doing this for 6 months and its a lot of work. I also have a 5 year old. I get paid $170.00 week. So I went to the mom and asked her for a extra $30 week. And she said NO. I feel I should make at least $200 a week. So, I am still watching the child, and I am not sure what to do, however I need the money. And I feel she is being unfair she compared me to a daycare $150 week 70 kids no food.