Long period

So, when I was a wee woman, and my second period ever (happened in 6th grade or something like that) my period was concerningly heavy. Like, doctors wanted me to go on birth control. I was so out of it and just... periods were horrible. Eventually they evened out and I had what most women consider normal periods, even if they got out of sync a lot (I'm over weight I know, so I was told that was fairly normal). But now, after being 9 days late after a fairly consistant run, my period had begun. And it's a rough one. It's been oddly heavier than what became the norm and it reminds me of middle school all over again. But here's the real catch. It started 9 days ago and hasn't even slowed down that much. I'm pretty concerned at this point and just wondering if anyone else has had this problem? I'm scheduling a doctor's appointment soon for it but I'm just curious if others have had this problem