What Does Blue And Itchy Toes And Fingers Indicate?

i have had some blue toes for three months...they look awful. Been to family dr three times... he send me for vascular testing and vascular surgeon, they found nothing. Went to dermatologist, he found nothing. Have a rheamatoligist apt in April. While taking a short walk today I noticed my fingers had turned blue. Help. I am scared. I don t think I should wait until April. My toes have been itchy, scaly. My hands are not.