Hi M.,
I had a miscarriage before conceiving my son and it was very early on, similar to your story, we had just had a positive pregnancy test and then a week later, I miscarried. My midwives told me that it was fine to try again whenever I felt ready. So, about 2 months later we did conceive again and went full term. They explained that the miscarriage often gets the hormone levels where they need to be in order to carry full term. But, I would always recommend true medical advice, as I am not qualified. There are Women's Clinics in Dayton and in Kettering and they often help women with no insurance. Their services are free, free pregnancy tests and free ultrasounds, and they can refer to an OB/GYN that can also help. Their number is ###-###-####. I don't know much more about them, other than maybe their medical expertise can help.
Good luck.