How much blood is too much?

Hey y'all,

I'm a grownass woman so I'm way embarrassed asking this question.. but how much menstrual blood is too much? I use a diva cup so I see exactly how much I'm losing, and in the last 5 hours I've overflown twice. I'm at 60ml in those 5 hours. Is this just a heavy flow or should I be worried? I'm used to a heavy flow, just not THIS heavy. I can normally wear my cup for 6 hours.

I did get a copper IUD during my previous period, can this much bleeding be because of that?