Yes if this is the way your period has always been then it is normal. Also if you are on birth control then you will be more likely to skip a period. But there is also the fact that you could have an issue with fibroids that is causing your period to skip.
No. It's not really normal to skip your period. A number of things can actually alter your monthly period. Things like stresses, major changes such as moving or a new job or an illness can change your period.