What Causes Lower Abdominal Pain And Nausea While Having Fibroids?

Hi I have lower abdominal pain on the right side just off centre. It has come and gone over the past couple of months and sometimes I feel faint and dizzy when the pain is there. Nauseous and have to lie down. I have been diagnosed with fibroids about tow years ago. I am 56 and postmenapausal