There isn’t much you can proactively do, really. It’s more important to avoid trying to self-medicate during this period, so many patients report temporary, and sometimes persistent, worsening from trying different substances. I don’t really recommend self-medication beyond the 12 month period either.
Best things I can recommend at the moment is to have people around you who care for you. Try to limit externally stressful situations as much as possible. Be kind to yourself, don’t self-blame.
If you want to inform your doctor of what has happened to you, you could give them this PFS resource pack https://www.propeciahelp.com/wp-content/uploads/2019/10/PFS-Letter-to-Health-Care-Providers.pdf
I was in that state. Like I said, it took 6.5 months for a significant improvement.