Hi,
Welcome to the ehealthforum and I am really glad to help you out.
What you are having is migraine headaches due to hormonal imbalance by taking out the Nuva ring causing trigerring of migraine headaches.
First of all lifestyle modification is required. Go to sleep and wake up at the same time each day and exercise regularly (daily if possible). Limit stress through regular exercise and relaxation techniques, Also avoid bright or flashing lights and wearing sunglasses if sunlight is a trigger, Identify and avoid foods that trigger headaches by keeping a headache and food diary and Limit caffeine consumption to less than two caffeine-containing beverages a day. Applying cold packs to the head or pressing on the bulging artery in front of the ear on the painful side of the head may provide temporary pain relief.
You can also try OTC pain killers. If still the symptoms persist, then please consult a physician for specific anti-migraine therapy.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care.