No period...problem or not?

I rarely get my period. I normally only get it if I'm on some type of birth control. I guess what I'm trying to find out is if anyone (that has experienced this) is it a problem or not? Also, I'm 28 yrs old and would like to have a baby soon, so I don't want to take birth control and prevent me from eventually getting pregnant. Can I still get pregnant without getting a period?