That stinks.
These are symptoms lots of folks have when they quit, but seems a bit odd given your drinking pattern with lots of time downtime between sessions etc.
If you believe in woo woo, could be the universe's way of confirming that you are making the right decision to stop.
Not a doctor, but I venture that it will get better with time, and if you don't drink again, it wont happen again, theres that universe again...