Suggest Treatment For Severe Anxiety

Question: Hoping for an answer tonight. The neurologist I talked with does not seem to be available.
his is an unusual question as I am a little unsure of my symptoms. To start, I am a terrible hypochondriac.

The other night I woke and as I was returning from the restroom, I thought/felt like there were lights flashing in the room. It was very regular- maybe on a second/off a second. lasted a few minutes. Actually felt like it was from an external source, but I couldn't identify its origin. Seemed like an alternating patch of light on a wall, then covered by a shadow. Maybe electrical, or helicopter, for example.

I noticed it on one wall especially where a clock light was shining, but not on other walls.

My anxiety causes me to worry about brain tumor. I know its hard to interpret, but do the symptoms seem concerning.

I have no nausea, no balance problems, no thinking problems, no headaches.

Have not had a repeat occurrence in the last 3 days.

Does this sound like it is an internal or external source?

Thanks.
Asked by Me , 24 hours ago
Doctor's reply to your question above...
Brief Answer:
Nothing to worry if single episode

Detailed Answer:
Hello,
I have gone through your question and understand your concern.
Single episode of such symptom in night while awakening from sleep maybe be hallucination.
Possibility of external source is less likely if you have searched for the source.
Repeated or persistent symptoms requires further investigation.
No need to worry at present.
Hope you found the answer helpful.
Do get back to me for further information.
Regards
Dr N XXXXXXX
Neurologist
Replied by Dr. XXXXXXX XXXXXXX , 23 hours ago
Disclaimer: The Expert's advice is provided for general informational purposes only and SHOULD NOT be relied upon as a substitute for sound professional medical advice, as a complete assessment of an individual has not taken place. Please consult your nearest physician before acting on it. The advice is not valid for medico-legal purposes also.
Sorry - but one follow up if I may (feel free to charge me again). My strong feeling is what I experienced was external.....but hoping you could address the symptom and pattern.

How likely would a brain tumor cause a regularly timed perceived flash of dark that lasts a second or less, but keeps repeating at a consistent interval of very second or two.

It really seemed external, but could you comment on the specifics of the symptom, which was very brief with regularly spaced repetition.

Thanks again. I am very hypochondriacal.
Asked by Me , 1 hour ago
By the way, the pattern only seemed to take place in just one side of the room I was in, and lasted maybe 2 minutes or so.
Thanks.