birth control
"For those of you experiencing negative side effects...
I was on NuvaRing for 4 years.  During that time I became depressed, and cramps and back pain were unbearable.  I have discontinued use of NR and feel better. All side effects are gone! When I discussed this with my Dr., she stated that some women naturally produce a normal level of hormones.  When these women are on birth control, it can cause all of these side effects due to having an elevated level of hormones.  The opposite effect happens to women that don't naturally produce a normal level of hormones, leading them to actually feel better and not have all of these side effects. Which is why some women do well and feel great on birth control and others don't."