 [ Symptoms ] what are other names for cystic fibrosis [ Disease ] if you took a test and it came back neg it does not mean you are not pregnant some women do not produce enough of the hormone needed to show up on a pregnancy test make an appointment with your obgyn and let them know what is going on ask for a ultrasound it sounds like you may be 5 months along good luck and i hope you get the answer you are searching for