Hi stepka --
I do not know the ins and outs of it, but be aware that there is a special program to provide treatment for breast and cervical cancer patients who are uninsured, that, I think, is Federally funded. I know we have it here in AZ, so I looked it up for Missouri, and it is available there. There is also a program to pay for the screening test.
Now, these are not well-known programs, so you may have to do some detective work to find a place that will treat you. It probably would be easier to relocate to a state that has expanded Medicaid, like other people have suggested.
Good luck to you.
https://mydss.mo.gov/healthcare/brea...atment-program