Am I About To Get My Period?

So today I've had a little stomach ache, nothing too bad, but a little. Yetserday I also had a little stomach ache. Today I have been the biggest ***** ever, like i've just been in a terribal mood. My boobs started hurting about 30 minutes ago and like my glands hurt. I've never gotten a period before and im 13. Could I be starting my period soon? Please help and don't say "EWW" or anything. Please and thank you. <3