What Causes Swishing Sound In Head After Zoloft Withdrawal?

Hi,I have been on zoloft 100mg per day for over 20 years. I recently went to renew my prescription. My pharmacist contacted my Dr. 3 times requesting a refill, as did I. None was given. No phone call returned. I have been in severe withdrawal for the last 8 days. I am experiencing a swishing sound in my head. How can I make it stop?