90 Accord LX, auto, 191,000 mi. driven responsibly....most of the time

I had been using non-Honda tranny fluid for the last few years with no problems. About two months ago, I started experiencing rough shifts, a blinking "S" light on the dash, and an occasional hesitation on starting (like it was having trouble shifting into first gear). The tranny fluid was changed twice with Honda ATF and the problems disappeared. The car shifted perfect for the last two months. Although I could feel a slight vibration at different points as engine speed increased.

Thought everything was alright until today. I started the car and before I could even shift out of park, the "S" light started blinking and the shift-lock solenoid began engaging/disengaging with each light flash. There was also a relay clicking sound coming from the tranny control module area while this was happening. I still feel a vibration at certain points throughout the RPM range when accelerating.

Anyone ever have something like this happen? Could this be the last days of the tranny or simply a bad control module? Any help greatly appreciated.