I am self-employed and did not have insurance; I know what you are going through. This is after I was laid off after always having been employed with insurance. After some lab work and examinations, the doc at the walk in clinic I used when I needed medical attention told me, “you need to spend some money on this.”
I heard a radio commercial during this time that saved me. I now have insurance that covers pre-existing conditions at an affordable rate with good coverage. Go to www.pcip.gov and you can see the program for you in your state. I live in CA and they have some state participation which makes it a better program than just the federal one. FYI: co-pay for Enbel is $30, I am in process of getting it.
Let me know if this helps.