If I remember correctly, vini has the most experience with CSF. Tears can also flow into your throat. If your tear duct is clogged, you can get it flowing backward.

Either way, it sounds like you need to find a doctor with experience in mild Traumatic Brain Injuries, not just any neurologist.

Second Impact Syndrome can be very dangerous. The weak brain tissue from the previous impact can be very seriously injured with just a minor impact. A CT scan might be recommended.

I would not waste too much time. Better safe than sorry. I have suffered multiple impacts and know first hand how damaging they can be.