What Is Causing My Memory Loss, Headache And Sensitivity To Light And Sound?

This isn't a concussion but here's some symptoms
-bad memory
-headaches getting gradually worse
-Nausea
-Sensitive to sound and light
-really bad concentration

*I went to some concussion clinic and the doctor said it had nothing to do with the concussion i had in march. I however did fail the impact testing, so they're trying to get an appointment with a neurologist and the closest appoint is november 21st..so they are trying to make it earlier and saying its an "emergency"
but has this happened to anyone?
Or does anyone know what it might be?