It seems that you have many symptoms that may not be related with just one disease. Heavy bleeding during your period and discharge with slight blood can be caused by the polyp found in your uterus. A polyp might also be complicated with a secondary infection. If the ovarian cyst is hormonally active, it may also contribute to the irregular and heavy periods. The anemia you report may be caused by the heavy bleeding during your period. Frequent urination, on the other hand, can be caused by a urinary tract infection. Bloatedness in the abdominal area, nausea, vomiting and constipation are all probably caused by some gastrointestinal disorder. A patho-hystological examination of the removed uterus’s polyp is crucial for establishing a correct diagnosis and for further recommendations for therapy in your case.
Ovarian cysts can be functional or neoplastic (tumors).
Functional ovarian cysts (follicular or lutein) are hormonally active and they cause lack of menstruation, cycle irregularities and heavy periods. Functional cysts are typical for women who still have menstrual cycles (and who are within the reproductive age). Functional ovarian cysts usually disappear spontaneously in 2 months.
Neoplastic cysts (benign or malignant) may also be hormonally active, depending upon the cell type. Neoplastic ovarian cysts don’t disappear spontaneously but they grow in time. Women in the period of reproductive climax (above 45 years old) usually don’t have functional cysts but are diagnosed with neoplastic cysts, usually malignant.
Both types of cysts have no symptoms when they are small (in your case, 2,5cm diameter). When cysts are big, they can cause pain. In the case of complication (a rupture, necrosis or bleeding of the cyst) symptoms of acute abdominal pain occur (sharp abdominal pain, vomiting…) and immediate surgical intervention is requested.
In reproductive aged women, if the cyst is smaller than 5cm in diameter, we wait for 2 menstrual cycles in order to observe a spontaneous disappearance of the cyst. If it doesn’t disappear, the cyst is removed surgically. If the cyst is larger than 5cm in diameter, then the cyst is removed surgically without delay. For women above 45 years old, any cyst is surgically removed without delay... no matter the size.