I had my first period over a year ago and have only had another two since. Is this weird? Also I regularly get a small amount of discharge which I noticed even before my period started. It's a sort of clearish colour with black in? Is this an infection or what? Please help...

It is your system ramping up your hormones to deal with your periods. I am not sure if it is normal, but that should be a question for your mother or your doctor.