*agree!*
actually, that bit about needing to have had a child, there is actually a medical reason for that, which a former co-worker of mine found out when she had one inserted. She had to have it taken out two weeks later due to incredible pain. You need to have had your cervix dilated before.
Are you unable to tolerate the oral meds? There's a couple I've had good success with, and I often have trouble with medications.