I Am A 28yo F. For The Past 2yrs, Have

i am a 28yo f. for the past 2yrs, have had periods where i've spontaneously developed scattered ecchymotic area on my legs. for almost the same time, i've noticed my hands are usually cold and in general, become cold easily. i have had bloodwork done after this began and was told my results are normal. my pcp hasn't pursued this further, and neither have i - probably out of fear. could you advise me of possible causes and which tests i might need for diagnoses, please?