Levonorgestrel
"Yes it definitely worked as a birth control but completely changed my personality in the meantime. The 14 day periods, tender breasts and stabbing pains, I could have coped with until it settled; but the anger out of nowhere, falling out with family and my partner, irrational crying, feeling totally emotionally unbalanced and actually hating who I'd become were horrific. I'd be very careful when choosing this contraception and look out for these signs and get it removed asap."