I have had 3 copper coils over the years but with no hormones to send me potty, ha ha. Got migraines too with hormones so I avoided all the side effects from them by having a copper coil.
Had my first about 25 years ago
One of my clients suggested I try it and it was the best thing ever. She still has one in and she is 58....don't know when she will have hers out!!!
Periods were longer , but as mine were good anyway without pain I really had no problems at all. Around 7 days with the first 2 quite heavy and the rest were actually normal.
Try it out , see for yourself , because as we are all very different you will never know until you have tried it.
It is fitted during your period to ensure you are not pregnant when it goes in , I think because your cervix is dilated during your period enabling it to go in more easily. Well that's what they told me at the time, However information could change and my comments could be out of date.
Good wishes and go for it .