Wake up suddenly to a sudden “pop” or “white light”?

Hello,
I have been waking up to a loud “pop” like a balloon breaking in the middle of nowhere or a sudden white light for about 3 years. I was just referred to a sleep study in March but suffered a concussion and am dealing with post concussion syndrome.

Has anyone experienced this or something similar? It scares me and doesn’t happen every night… but more than once a week.