I did a mammogram and was called back severally for a follow-up mamogram. Does it mean I have cancer? I am really scared.

Not exactly. It just means they see some irregularity and want to get some compression views. If additional imaging shows an abnormality, an ultrasound may be done. This is a lot more common given digital mammography. We are seeing a lot more detail and a lot of the time it is benign. Hope this helps.