2 periods in a row?

Thyra • 17 year old Heathen. “My gods will be at my side to victory or Valhalla”

So I started my period Monday morning (right on schedule). And it was completely normal. Started being less and less daily until the day I should've stopped my period (Thursday). And then Thursday night I got extremely heavy flow as I normally do on the first day of my period. It is now Sunday and all the symptoms are repeating as if I had two periods in a row? Is that even possible? Could it be caused by the stress of Irma? Cause I had to evacuate from where I lived. Please ladies, if you know what this is from or if you've ever been through this, please help me. I'm only 15 and so I can't just go to my gynecologist and have them tell me what's going on. Thank you so much, I really appreciate it.