Barbsjw, I'd probably at least phone your doctor's office and ask them that question. I'd guess they'll want to see you soon (I don't know much about American health care, so not sure if there is a substantial cost involved for you in doing that? If so then I guess you could research some, but at least our experience was family doctor wanted to see my wife right away for a general assessment of health, and then set her up with an ob/gyn -- there was a couple of weeks before seeing the latter I think, but it has been a long time so I might not be remembering properly)
We are pretty sure that our son was conceived during our one and only use of the contraceptive sponge, which we were only trying because of that one Seinfeld episode, so we joked that his middle name should have been 'Spongeworthy.' (we were taking some chances at the time and were open to having a kid, else we wouldn't have tried something new in that regard, so it was no great stress to us, just more amusing)