That's normal. It's pregnancy Medicaid and it's only for the baby. Medicaid pay for all expenses related to the pregnancy and the aftercare of the pregnancy. In some states Medicaid will pay for family planning for one year after the birth, which birth control.
And the baby should receive medicaid for as long as needed if you meet the income requirements.
I'm not sure what you thought Medicaid was going to do or what bills you think you need to pay. Oh and because you live with your Mom and you're under 22, your income is whatever your mom's is. So if her income exceeds the requirements then you don't get anything, like Medicaid, Food Stamps, etc.