2004 Dodge Caravan Electrical Haywire

My Dodge Grand Caravan is having some strange electrical issues.
After it being driven home from work the night before, I got in and started it. It immediately stalled after starting.
I tried 6 more times, same thing. Stall. Then I noticed the gauges were not working, but accessories like radio were. I checked fuses, checked battery, tried jumping, and charging battery over night. It's NOT the battery. After I switched the starter relay with another one, the starter no longer worked. I switched it back, still wouldn't work. The headlights on the car click on and stay on, even if I try to turn them off. (This is when the key is in the "ON" position). All I hear is the relay clicking when I turn the key to start. The gauges ARE getting power, as I ran the diagnostic (holding the button on the gauges in). It ran the diagnostic and gave me 5 codes, starting with E and 3 digits, a decimal, and another digit (like this: 400.1). The last code was 400.1. I'll run it again if needed. These issues all happened at once overnight after a major lightning storm. Could lightning do this?