I'm 13, 5'1, 116 lbs and I have no allergies, rashes, conditions, and I've sprained my ankle only once. Anyways, I've been really scared lately because I have chronic lower back pain (that could be from working out days before), today I had a headache, right now I have cramps, and I'm not that moody anymore...I'm way more happy and normal and not irratitable...AM I GETTING MY PERIOD? I'm very scared! I have almost all the symptoms! HELP.