Hi, I'm 17, not sexually active, and do not use birth control. I had my period about three weeks ago, and then five days ago I began spotting, which turned into a flow heavier than spotting but lighter than a normal period. This flow is inconsistent and is sometimes heavier than others; it also stops at night. I do not really have cramps, but sometimes a very mild pain on my right side. What is going on? I am freaking out. I have also been under a LOT of stress recently.