I've had two periods since my c section and they've been insanely heavy. I have used a mooncup for 8 years and always empty it first thing in the morning and last thing at night, and can forget about it in between. But now I have to empty it every 2-3 hours or it overflows 
All my bed sheets are ruined because otherwise I'd be setting alarms in the night to change it. That's despite me wearing a pad AS WELL. I knew my periods would probably change but I'm not sure this level of heaviness is normal. As stated, I had a c section so it wouldn't be due to anything stretching. It actually does get completely full. Does anyone else bleed that much (esp those who use a cup?)