If you had an abdominal CT Scan and anything was cooking in your belly it would have shown up. If they included the pelvic region any problem with your female organs would have shown up unless they are to small to be detected.
Knowing you have health anxiety, I would talk to my Dr. re your concern and take this person's advice. You might ask for a CA125 lab test however if you don't have any family history or sx indicating you may have something wrong with your ovaries, some insurance companies may not pay for this test.
I have known some women to pay for the test themselves.
I suspect you anxiety is kicking in however, I am not a Dr. so I cannot say for sure you are OK.