One morning I left for work, had to stop to get gas. After I finished filling up I tried to start my car, she shouldnt start. Nothing would come on, no lights or anything would turn on so I thought it was the battery. So I checked the battery and it was all good I also checked the alternator and all the grounds associated with the battery. I'm a little stumped here, some friends say it could be my ignition relay and I'm not sure where I should start troubleshooting.