Hello,
You had a baby and then breast fed for about 7 months. Now you are having irregular bleeding. A small cyst was found on your ovary.
When a woman breast-feeds, this turns off your normal menstrual cycle. As a result most people do not have periods while they are breast-feeding. When you stop breast-feeding, it may take your body a few months to start cycling regularly. What that means is that you have the normal feedback between your brain and your ovary. Your brain produces hormones (gonadotropins – FSH (follicle stimulating hormone) and LH (luteinizing hormone)) that signal the ovary to ovulate. The ovary makes hormones (estrogen and progesterone) that tell the brain it is working.
So it is common to have bleeding that is irregular and may not look like normal menstrual blood. There are definitely other things that can happen after childbirth such as an infection inside the lining of the uterus (endometritis) or the retention of a bit of the afterbirth. This can cause abnormal bleeding, pain, and fever. I do have enough information to comment on that for you.
The ovarian cyst might be your ovary’s first attempt to ovulate after 7 months of slumber (while you were breast feeding) or it could be something else. Time will tell. The standard approach is to wait a few months and see what your bleeding pattern is and to get a follow up ultrasound to look to see if the cyst is still there.
The most common cyst is a follicular cyst. In the setting of all the physiological changes and anatomic changes that you have undergone with childbirth and breast-feeding, it is not unusual to have an abnormal ovulation. The follicular cyst is the cyst before ovulation. If ovulation does not happen because of the reasons I stated above, the follicular cyst can persist; get bigger, and maybe hurt. Because of their thin walls, these cysts easily rupture and cause transient pain. It is thought that the gonadotropins may stimulate the follicular cyst to get bigger. The birth control pill suppresses the gondatropins and in that way may shrink the cyst. Additionally the Pill will help you “cycle” regularly and give you a monthly period (and also provide good birth control until you want to get pregnant again)
So it is standard to recommend an oral contraceptive pill for 1-3 months and re-evaluate with a repeat pelvic ultrasound..
Best wishes