Hey there friend, sorry you're experiencing this! I know that it can be disturbing/scary - but I wouldn't get too concerned about it just yet. Persistent long-term HPPD is quite rare, but visual flashbacks lasting a few weeks after a trip are a lot less uncommon, so there's a good chance these symptoms will subside on their own eventually.
What symptoms are you experiencing? Is it just visuals, or are the visual distortions accompanied by body sensations or mental effects? How often are you experiencing these symptoms? How intense are they - are the visual distortions severe enough to make it difficult to see normally, or perform tasks like driving? Was this your first trip? If not, how experienced with psychedelics are you, and have you experienced similar flashbacks previously? What meds do you take?
As for talking to a doctor, if these symptoms don't go away on their own over the next month or so: maybe it would be possible to see a doctor other than your PCP? TBH, though, there's not terribly much a doctor can do - there is no recognized treatment for HPPD. I've heard some reports that benzodiazepines (xanax, valium, klonopin, etc.) can help lessen the intensity of the symptoms, but I don't think most doctors would give you a benzo script for HPPD (especially these days, since new research is suggesting that long term benzo use may pose previously unknown health risks and docs are tightening up on prescribing them to new patients - but also just in general, because HPPD is diagnosed entirely by self-reported symptoms and doctors tend to be suspicious of anyone who seems like they're gunning for a benzo script, especially someone who admits to recent recreational drug use).
edit: I also noticed from your other thread that you mentioned smoking - I assume you mean cannabis? Do these symptoms only manifest when you smoke? Cannabis can trigger flashbacks for me up to several weeks after a trip.