I’m not an expert in infectious diseases or vaccines, but I don’t believe that anything like a cytokine storm has happened with any of the vaccines. Given the volume that have been administered, if the vaccines provoked such a response, it would be known, just as we’ve seen rare cases of blood clots or myocarditis.
As for the feelings of mood and concerns about “dark energy,” let me say at the outset that I don’t offer personalized feedback or readings to people via Medium (and I’m currently on hiatus from private sessions), so what follows is general and applicable to most. It’s possible you felt worse because of your body’s natural immune system ramping up in response. I know mine did for a day or so. Since then, I’ve continued to have deep kundalini activity and receive massive transmissions of light, and so my personal path has not been altered for the worse by the vaccine.
Among spiritual folks, I find there’s often a deep concern that they’ll do something that’s going to derail their growth or “ascension,” that something they might introduce into their bodies will open them up to some kind of negativity. I’ve known many people who were deeply concerned about that kind of influence in their lives, including fears of dark entities. That kind of fear often overrides reason and intuition, thus allowing for a kind of “conspiracy brain,” to use your phrase, to take charge. That deep fear of negativity usually reflects unresolved past life issues carried over into this lifetime and still needing to be worked through. So negative energy that came through after the vaccine was probably already hidden in the chakras; the vaccine didn’t introduce it, but the fear around it might have triggered the release. Again, none of this is specific to you, but generalized trends I’ve seen.