What are some symptons of having fibroids?

The most common symptoms are: heavy - irregular periods, pain, multiple miscarriages, spotting, pelvic fullness, bladder pressure and frequent urination, painful intercourse, low back pain. And of course, there are some women who have no symptoms.

Heavy bleeding.
Bleeding. Approximately one-third of women with fibroids suffer from abnormal uterine bleeding. Many women develop heavier menstrual flow that lasts more days than normal. Some develop irregular bleeding between periods. If not treated, heavy bleeding can cause significant health problems such as weakness, fatigue, and shortness of breath on exertion.

Pain. Many women with fibroids experience symptoms of pressure and pain, sometimes feeling a sense of progressive pelvic fullness or a dragging sensation of their pelvic organs. This is most commonly due to slowly enlarging fibroids. Pain occurs when the fibroids put pressure on other pelvic structures. This may also affect bladder and bowel function. For example, if the fibroid presses on the bladder, it can reduce the bladder's capacity, resulting in the need to urinate frequently.

Infertility. Fibroids may be the cause in as many as 5 to 10 percent of infertility cases. They can inhibit implantation of the fertilized egg in the uterine lining by altering transport of the sperm, compressing the fallopian tube, or disrupting the lining of the uterus. In addition, fibroids can cause spontaneous abortion during the first three months of pregnancy, either by distorting the uterine cavity or by altering the blood flow that would normally be needed to nourish the growing fetus.
http://dev1.drlark.com/nc/fe_fibroids_sy...
Heavy bleeding, longer periods, and pelvic pain/cramping. I've also heard that fibroids can cause "breakthrough bleeding" between periods.