I haven't had a period in about 3-4 months. I have had no real life changes, stress, etc. I have taken numerous pregnancy tests and all are negative. This has never happened to me in my life, I have always been fairly regular (28-30 days). I am getting worried. The only thing that is different in my life is a medication I am taking called Invega. I am just asking because I am worried, I will be seeing my Dr but I just can't wait, you know? My mother had cervical cancer so I have a fear of that.

Have you researched you medication? I think that you are taking the appropriate steps by seeing your doctor, I would ASAP.
When you were prescribed this med did they mention this as a side affect?
How old are you, any serious weight gain or loss recently?

I'm 30. There's been no changes in my life, my weight, stress or anything like that so that's why I'm thinking it's a medical issue. Can cancer cause this? My mom was the same age as I am now when she got cancer (but I don't speak with my mom so I can't ask her). I'm just kind of freaking out about this now!