I can understand how scared you all are. I was in the same boat about 2 years ago. I was told while I was pregnant that I was a carrier for CF. Like you, I knew of no one on either side of the family with CF, and to be honest, didn't know anything about the disease. My OB arranged for my husband to be tested also. They done the simple test that only tested for the most common mutations, and we were told that my husband was NOT a carrier. The chances of him carrying one of the other more rare mutations was less than 1%. So we went the rest of the pregnancy thinking everything was ok. Sure enough, after my son was born, his newborn screening came back abnormal for CF, and he DOES have it. We done a repeat genetic test on my husband, myself, and my son. This time we used the Ambry CF Amplified, which tests for all known mutations. Sure enough, my husband was a carrier of a very rare mutation, and passed it on to my son (along with my gene.) To this day, we've never seen anyone else with my husbands mutation.
So, just because you don't have a family history doesn't make you safe. And, I'd prefer to get the Ambry CF Amplified test if you could afford it. Is a state card an option?