"i was on the nuvaring for 2 years. i loved it. however, i started getting low back pain on a saturday and thought nothing of it. monday i had a doctor appointment, the dull pain was still there but i thought maybe it was because i was going to take the ring out in a few days to start my cycle. however, that night my leg started swelling. by the next morning the pain was so unreal i almost vomited. i went to the er where they discovered i had a rapid growing blood clot in my femoral vein (area between groin and upper  leg) that was 6 inches long. i was put on xarelto for 3 months and on bed rest for a week as they were so concerned it would break off and go into my lungs or heart. it took me 6 months to fully recover from the clot."