ParaGard
"I had a stroke in January 2016, the doctors' theory is that it was the hormones I was using for birth control.  They had me take out my Nuvaring immediately. I needed a non-hormonal birth control and my gyn said the Paragard was the best thing for 10 years.  He inserted it the day I met with him, so I had no pain killers, I swore a blue streak when they put it in.  Spotted for a week afterwards, but i'm on massive doses of blood thinnners to prevent another stroke.  So i'm on my second period since insertion, and I'm bleeding like i got shot between the legs, again, the blood thinners make it worse. i'm trying to be patient and hope it gets better after the meds are stopped.  Can't beat 10 years and no hormones."