I miss my period for 2 months but am not pregnant.

Is this the first time it has happened? If it is then probably go see your GP. However if it isn't the first time then it could be normal for you. But I would suggest still going to see your gp. I have the contraceptive rod called implanon injected into my arm and this causes me to have two monthly periods.

What is your age? Are you on any birth control? Are you sexually active?

Let's start at the beginning and go from there.