severe menstrual bleeding and periods that last months

Hi,
Welcome to ehealthforum,
If your symptoms have been worsening, you should consider taking second opinion from another gynecologist at the earliest. The symptoms that you describe could be due to presence of fibroids, adenomyosis, endometriosis, PID etc. The exact cause can only be made out after careful evaluation. Usual imaging techniques can at time fail to detect conditions like adenomyosis, endometriosis, etc. Laparoscopic evaluation would be helpful to diagnose as well as treat these conditions. Consider taking a second opinion from anther gynecologist for your symptoms and go ahead with further evaluation. Get started on treatment as appropriate (based on examination and investigations results) to help you control the symptoms. If endometriosis is suspected/diagnosed, regression therapy can work in relieving the symptoms as well as control the endometrial implant growth/spread. Be in regular monitoring and follow-up with your treating doctor/gynecologist and report any new/abnormal symptoms immediately. Drink plenty of water. Take adequate rest. Maintain healthy diet and lifestyle.
Take care.