Oh okay, things are starting to make a little more sense here, also I apologize for not reading the part about the anxiety when qutting weed properly, sort of skimmed through that part. Having extreme general anxiety / anxiety attacks can definitely bring out the HPPD in most individuals, assuming they've had tiny indications/or not noticable at all for a very long time after psychedelic use. I gotta ask, about the Visual Snow, did you experience visual snow prior to this or is it included in your recent visual onset of things?
My story is sort of similar, but not really, I had started to notice extremely mild HPPD symptoms when it first started, really small things like not being sure if my negative after-images on those optical illusions stayed longer in my vision or if I was able to get the illusions quicker than most people. So we're talking really tiny things here, but you'll see the reason for this stupid rant very shortly.
The only reason I was looking for these kinds of things was because I had "imagined" the texture-pattern on my bathroom wall was moving slightly, wasn't evident at all.
So this is where it all boils down to: When I noticed I had these minor symptoms of HPPD, I started smoking cannabis a lot, on a daily basis (Was VERY uneducated about HPPD at the time) And the visual things seemed to go away, mostly because I was in such an early stage of my HPPD, I thought everything was fine at this point so I quit smoking cannabis, 1-2 days later... BAM! The anxiety of the cannabis "withdrawal", and probably the cannabis use to begin with, left me with full blown HPPD.
So really what I'm trying to get at is, it seems as though your onset is caused by extreme bouts of anxiety, but you are in such an early stage, that if you don't touch any stimulants at all, I would even suggest not touching benzodiazepines (Some long-term HPPD'ers use to ease the visuals) You have a very high chance at this point in time for it to go away, but only if you somehow are able to keep your anxiety on the low. If I've learned anything from personal experience, sure coffee, alcohol & various other substances do contribute to the onset of HPPD, and making HPPD worse if you have it is true. But through my years of experience dealing with HPPD the number 1 cause & reason for it getting worse is the damned anxiety. I would highly suggest you give it 2-3 weeks, to see if you can on your own, without medication manage your anxiety, which will be very hard but it's probably the best way out. If you cannot control your anxiety, and you might start noticing the HPPD getting worse, OCCATIONAL, and very low dosage usage of benzodiazepines like clonazepam that have a long half-life will be able to maintain your anxiety so that you don't make it any worse, besides it'll actually reduce your visuals while on it. But PLEASE try the sober way first, it's the way most people get rid of HPPD on the early onset weeks. As for how you should properly manage anxiety, I guess accepting it and constantly do things to sitting for hours and thinking about it will help.
Also if you still have some of that prozac, some people on this forum has reported it helping them with their HPPD. One more Thing. I know I might seem like an eratic keyboard-ridden warrior with my long, and sometimes poorly put-together replies. But if you ever need any help or advice personally feel free to DM
Take care now and enjoy life