If money is a problem, in most places there are clinics for low-income people who will give the necessary examinations and the pills based on a sliding scale according to your income. Check your county government website.
There are some that are and some that are not. You can get birth control as cheap as $15 a month. Talk to your OBGYN and tell them that you need the cheapest bc you can get and they can prescribe something cheaper if you need to.