Can fibroid cysts and heavy periods cause dizziness, lightheadedness and loss of balance ekg, tilt table.thyroid, and stress test all good?

Bleeding, anemia: Fibroids, also called leiomyomas are benign uterine tumors (not cysts) that can cause pain and heavy bleeding with your periods. If they are causing very heavy periods, this can lead to anemia and the dizziness, lightheadedness, etc you described. They are easily diagnosed with an ultrasound. See your ob/gyn for this.

Dizziness.......: Well, a heavy period , with fibroid cyst could produce anemia, low/iron, low ferritin, low hemoglobin. All cardiac test could be normal, but the abnormal blood count , low o2 produce symptoms like dizziness, loss of balance, lightheadedness, blurred vision, etc.I recommended you to see your pcp or fp for a complete exam, and determine causes, including possible ear problems.

Dizziness fibroids: If you are anemic from the fibroids and heavy menses it is possible. An easy blood count (CBC) should provide the answer.