Well this happened last month as well but my periods are very very light (using only 5 pads each period) and very short.

Is this a problem?

I'm a virgin, never had sex... dont know what else to say

Every woman is different. Having a short and light period should be a blessing compared to having a heavy and long one. I don't think there is any reason to be concerned about your periods as long as you are having one.

You may not be ovulating?