J.C.
I'm not following you...it sounds like you can conceive on your own (without medication) what does conceiving while on medication have to do with having miscarriages. Miscarriages, said to say, are just so common with or without fertility treatment. (I miscarried at 7 1/2 weeks).
Now if the $1600 medication was necessary to prevent a miscarriage then I would take it. If the $1600 is so you can get pregnant, then I would try again on my own since you know it is possible and if time was on my side (ie I was younger than 35 yo)