I'm sure that any medical professional you saw has already told you this, but the symptoms you experienced are normal, and referred to as "hallucinogen persisting perception disorder", and I had a very similar experience.
The symptoms will go away, and you'll feel better. Promise. 150 mcg of LSD is, in my opinion, more than I'd recommend someone taking for their first time. Microdosing (around 10% of your dose) and slowly increasing the dose is a much safer way of going about it, and I'd recommend doing it gradually if you ever feel like trying psychedelics again in the future.
For now, the best thing you can do is to stay busy and try not to focus on it. LSD can give you a very raw view of reality without the candy-coating of normal consciousness, and it can be a very jarring experience.
If you ever need to talk, feel free to reach out to me personally, or join the IRC chat at tripsit.me:
What the parent was describing isn't HPPD, which involves sensory disturbances, usually minor optical hallucinations, and is mostly limited to people who used psychedelics heavily over a long period. The parent probably experienced the disturbances of mood that psychedelics can cause in the days following a trip, got panicked that something was wrong, and then the anxiety perpetuated their destabalized state. Or something else, but not HPPD.
More likely, he experienced derealization or depersonalization. The shake in consciousness can be jarring in that, one realizes the weight of being the "one" behind the sensors, heuristics, and thinking. The ghost in the machine... Really, there are books written about this. The Wisdom of Insecurity by Allen Watts. Life is intrepid and scary because consciousness is a black box. Anxiety is just a symptom of being shown the unusual, being shaken to a core of meaning that defeats the usual humdrum of assumed knowledge.
https://en.wikipedia.org/wiki/Hallucinogen_persisting_percep...
The symptoms will go away, and you'll feel better. Promise. 150 mcg of LSD is, in my opinion, more than I'd recommend someone taking for their first time. Microdosing (around 10% of your dose) and slowly increasing the dose is a much safer way of going about it, and I'd recommend doing it gradually if you ever feel like trying psychedelics again in the future.
For now, the best thing you can do is to stay busy and try not to focus on it. LSD can give you a very raw view of reality without the candy-coating of normal consciousness, and it can be a very jarring experience.
If you ever need to talk, feel free to reach out to me personally, or join the IRC chat at tripsit.me:
https://chat.tripsit.me/