I did some MDMA not long ago, no crazy effects other than good vibes and good times.

As far as it being chemical, this is going on not just with OP but others around OP as well. This is either due to something being introduced into the water, air or food. If it isn't that than if could be energetic and having to deal with the immediate area they live in. Earth could be activating one or more energy centers they just so happen to be located next to.

I would like OP to answer my question so I can discern more of the possible data and come up with viable answers.

OP if you are wondering, I am a vessel of emptiness ready to fill and refill my cup. There are changes in earths resonant frequencies all the time but what I am trying to figure out if it is a good area or not. Seeing sparks means that this could be a new energy point located to you or an old one reactivating. Seeing how this is more than just you your talking about, the other is experimentation either from aerosol or poising from tap water due to flushed drugs, or planted chemicals in the water system. Serious answers about who and just how familiar the symptoms are between you. If it is just more of your own awareness of change than that would help eliminate many possibilities.