Your question is very important. First of all, I do not immediately think about ovarian cysts and ovarian cancer with the symptom of intermenstrual bleeding. But i do think it is not normal. here are a few things to consider:
-yes bleeding between your periods could represent irregular hormone secretion. that is if you are not ovulating each month, your ovary will produce estrogen but it will not produce the second female hormone, progesterone. In that case, the lining of your uterus - the endometrium- gets extra stimulation and when you bleed, the bleeding is for a longer time.
- if you have a change in your thyroid function, that can impact your cycles. it is worth considering a blood test to check for low thyroid. this is a very common problem in women.
- Pregnancy. Check a pregnancy test.
-make sure you have had a recent pap smear. abnormal precancerous changes in the vaginal and cervix and cancers in this area can give abnormal bleeding.
-structural problems inside the uterus such as polyps, premalignant growths (hyperplasia) and cancer of the lining of the uterus (endometrial cancer) can cause inter-menstrual bleeding. I always consider a biopsy of the lining of the uterus (an endometrial biopsy) when someone has intermenstrual bleeding