Thank you for your comments and motivation! After doing some reading yesterday evening and again this morning, it is clear that the mild pains and discomfort I suffered (and still do today) all correlate with the unfortunate "all that was"...
Ha, I cannot recall whether or not I planned the reiki session to coincide with the full moon! I am sure that it was intentional, though, regardless of whether or not I made a clear, conscious decision to do so.
And as you implied: No, there most certainly are no coincidences...;)