Agree with @MadDoc .... there comes a point where you have to try and get past the "why me" feelings, it's just negativity that will feed hppd.
There was no internet about when I was doing lsd, and even I had heard risks about "permatripping".... Everyone knows there is some inherent risks with drug taking... we got unlucky in some respects, sure... But I have seen people go onto the likes of heroin addiction, then crime, prison, death... i;ve seen people get full on psychosis from mdma, far worse then even the worst hppd... So maybe getting hppd before the drug taking got out of control is actually lucky, in some ways. If you go on to a full recovery, you may look back on this part of your life as the greatest lesson.
It's all about perspective.