I've been on my period since 2 weeks now. This has never happened before. I usually bleed for 5-7 days (it has once or twice went on for 10 days but never 14) but it has been 14 days so far this time! idk why this is happening... i don't feel sick or anything; just stressed and stuff... and i usually get my period anywhere from 20-30 days (idk why but it's just never regulated enough for me to get it on an exact day). And i don't have cramps or anything (i don't usually get cramps when i'm on my period; i sometimes feel nauseous though the first day and my back hurts but other than that nothing really). But why is this happening? When is my period gonna stop?

And if age matters - I'm 18.

Edit: Also my period isn't heavy, but it doesn't seem like it's going to stop