Does this seem off?

My period is so off track this month. Usually it last 3-4 days and it’s suuuuper light. Like I can wear a panty liner for most of it. However, I’m currently on day 8 ands its so heavy. I’ve gone through two boxes of tampons and pads. I’m freaking out because it’s never ever been like this, and I’m 21 and I’ve had my periods since I was 11