text: "A certain amount of free fluid in the pelvis, behind the uterus, is normal at certain points in your cycle; after ovulation, a small amount of fluid released with the egg collects behind the uterus and is eventually reabsorbed by the body. A larger amount of fluid may indicate a ruptured ovarian cyst. Pain is usually present in this instance, but most often resolves on its own within a few days. Infection is another possibility, but in this case symptoms such as pain and fever are often significant."\n\nPerhaps you should get a second opinion.