Period problems

Kali

So I just wanted some advice from all the ladies on here and get into some period talk. I was 2 weeks late on my period and was hopeful I was pregnant but took a test and it was negative. I then started my period and I am going on 3 weeks now of my period and am starting to get concerned, it is still heavy bleeding and isn’t really slowing down. Has anyone else experienced this? Or have any answers for such a long period? Thank you!