Syrinx c6-7 cause tension headaches? have been having on and off for a few days. also have eds3, pots, and 5wkpregnant. worried worsening. prognosis?

Perhaps: Sometimes a syrinx can cause pain, which can lead to muscle spasms. Particularly if this occurs in the neck, it could lead to headaches. However, this is a complex question that can't be answered without a full review of your films and a proper physical exam. Your best option is to talk to your primary care provider and also to the physician who follows you for your syrinx.