Again, I qualify my response with I don’t claim to be any kind of expert, but I will give my opinion based on my experience.
Short answer, I don’t think anything caused your second crash. I think you are suffering from PFS induced severe paranoia. When I say this, I don’t mean that I think you are imagining anything that is happening to you. It’s that you are paranoid in assigning the cause of the crash to something when there is none except the original source, finasteride.
There are absolutely substances to avoid, some well documented in this forum to crash you. I don’t think you have taken any of those substances a you are experiencing a regular crash. There seem to be two types of PFS victims. Those that are in a perpetual flat and shitty world, and those that fluctuate wildly. Those that fluctuate seem to fare better long term, you are very early on, you will have to see how your body responds. Right now it seems like you’re fluctuating.
That being said, I think this paranoia is something that you can and should absolutely address. When I crash, I get sucked into the exact same thought process you are presenting. When I feel better, it goes away. Even though I know it’s happening, it’s still SO hard to escape its grasp. Here is what I did and still do, and what I would recommend to you.
I would recommend to restrict your diet to the point that you know it’s not anything you’re eating that is crashing you. You’ll still likely go up and crash down, but it will help you remove some of the paranoia and help you focus on the fact that the ups and downs are part of the process.
I did no alcohol, no caffeine, no supplements, and a no carb carnivore diet. Honestly, I hated it, but I do felt it helped me. If anything, to help ease that pull of the paranoia. I then slowly opened up my diet to include veggies only, before adding other items. It was years before I added caffeine, and I’ve only tested alcohol twice now and my response was so poor I’ve simply decided that it’s no longer something I need in my life.
So, I don’t think it was anything you ate or did, but if you think it was and it makes you panic and feel badly? Then remove that from the equation. Regardless of if it really did crash you or not, removing your triggers will help you feel better.
Me even now, when I crash badly enough I remove caffeine and start restricting my diet. I know it probably does nothing, but it helps my thought processes.