What Causes Numbness In Toes And Feet While On Nuvaring?

Since last night I have had the sensation of numbness, specially in my big toes and on the inside of my feet. I have been on nuvaring for 6 months now and my health seems to be deteriorating. For instance, i get extreme hotflashes specially at night and vaginal dryness. I also suffer from hypothyroidism. I am wondering if now the numbness is another side effect of the nuva ring.