Period Talk. (Irregular Bleeding)

Normally I catch my period and it’s not so heavy but I usually bleed the most on the 2nd to 3rd day and on my 5th day I’d barely bleed. But this cycle I’m on now is totally different. On my 2nd day I bled heavier than usually and it’s now the 5th day I’m still bleeding like I’m on my 3rd day. Someone tell me what may be wrong?