hi doctor, I have been diagnosed with polysctic ovaries and currently taking Minerva and metformin at night, after my last period which ended last Wednesday i passed 2 blood cloths in my urine and then again on sunday and again yesterday. i also have lower back pain , have had headaches recently and i feel light headed and dizzy from time to time. i am on 28 years and i have given birth in Jan 2012. is this something serious, what is it?