Copper coil - am I losing too much blood? (sorry if TMI!)

[MiaSparrow]

After some advice please! I was hoping this might calm down but after 18 months or so it doesn't seem to be...

My periods last on average 10-12 days, day one to five, pretty normal to heavy, then typically around day five - just when it should be trailing off - it gets REALLY heavy. At worst I can't go for longer than an hour without leaking on a Super Plus Extra (!) tampon. I need to go and see about this don't I?

Just reluctant because I love the non-hormonal element and I'm severely limited (doc's words) on anything else.

Oh, and before DD I was nothing like this naturally. Incredibly light, in fact.