Nothing to be sorry over.
My personal opinion at this point is that the SD card got knocked loose, and wasn't seated correctly.
That seems like a horrible design. How are you supposed to see if the pins are aligned correctly?
I mean it should just slide in, but maybe it doesn't fit the tolerance every time.. IDK.
Again, to recap what I did to fix it.
I removed the SD card, reset it to factory default, and it booted.
After that, I put the SD card back in, and all is still well.
Thanks for your help xda-dev forum!