Period help!

Hey guys it's a weird question and i kinda get embarrassed talking about it but anyway. My period normally lasts 4-7 days. That's normal for me. But for the first time since I got my period at 13 I was On for 11 full days. 9 were heavy then it just stopped. Out of nowhere?! Like no slowing down and eventually Coming off? It was weird and pretty draining if I'm honest. I suffered with terrible headaches, backache and light heads. I fainted on the 7th day! I'm a little worried anyway. Is it something to worry about? And please be kind. X

Vote below to see results!