Heavy bleeding returned

I’m 5w 4d pp. I stopped bleeding 3wks but a week later.. I’m bleeding again like a heavy period. It’s gushed out like bright red water and it has continued.. in like 2-3 hours I’m having to change a pad. Is that normal? Am I bleeding too much to where I should be concerned?

I also called my dr.. waiting for a call back due to him delivering a baby.