Telvaker,
EVERY patient I have consulted with during the past four years has been "assured by their doctor" ,or doctors, that Tarlov cysts do not cause symptoms. While I am not a doctor, I can assure you that these cysts do indeed cause symptoms, including what you have described.
You will need to be evaluated by a medical provider who is experienced in the successful treatment of Tarlov cysts.
"Bridges"